Blood type changed during pregnancy

[Anonymous]

Anonymous wrote:

Anonymous wrote:

Anonymous wrote:

Anonymous wrote:

Anonymous wrote:As someone who works in the field, the likeliest explanation is that you mistakenly thought you were B- when you’re actually A-. We get a lot of patients that say they were mistyped. The scenario that usually ends up playing out is that they were incorrect about their blood type. When you have this job, you realize just how faulty the human memory can be.

We get a lot of people who think they’re B (+ or -) when they’re actually O (+ or -) or A (+ or -). We also get a lot who think they’re the universal donor (O-) when they’re actually O+ (the most common blood type). Many can also not accurately remember whether they are + or - even if they know their correct ABO group. These are the most frequent mix-ups for some reason.

I’ve noticed this too. I think it’s just human nature to want to feel special or unique, even when it comes to something like blood type. The amount of people that I’ve seen claiming to be the universal donor is very disproportionate to the percentage of the US population that genuinely is O- (between 7 and 9 percent).

https://my.clevelandclinic.org/health/treatments/21213-blood-types

Maybe I’m selfish, but I’d rather be AB+ than O-. It’s more beneficial to the individual. O- can donate blood to anyone with any blood type, but AB+ can receive blood from anyone with any blood type. Those who are O- can only receive O- blood.

Anyone who is O- and needs a blood transfusion will be straight out of luck if they ever have a severe shortage of O-.

I’d rather be type A than be either of those. I believe studies have come out that identify type A as the blood type with the lowest risk for the majority of illnesses and as the most protective against viruses and infections. This was an area of interest and research during the COVID pandemic. I remember people talking about it. Unfortunately, I’m (along with my DH and kids) stuck with O. That genetic lottery business is brutal.

It might be a coincidence, but every single person that I know of who is type O has some sort of problem with some part of their digestive system/GI tract and experiences digestive symptoms. They usually struggle with spicy or acidic foods and dairy products. It doesn't matter how healthy they otherwise are. This is a common theme.

What data do you have to show this is a "common theme"? I have O type blood, and no GI issues whatsoever, similar to my family members who are also type O. You may need to take a basic statistics and a basic biology class before spreading weird anecdotes.

[Anonymous]

Anonymous wrote:

Anonymous wrote:

Anonymous wrote:

Anonymous wrote:

Anonymous wrote:As someone who works in the field, the likeliest explanation is that you mistakenly thought you were B- when you’re actually A-. We get a lot of patients that say they were mistyped. The scenario that usually ends up playing out is that they were incorrect about their blood type. When you have this job, you realize just how faulty the human memory can be.

We get a lot of people who think they’re B (+ or -) when they’re actually O (+ or -) or A (+ or -). We also get a lot who think they’re the universal donor (O-) when they’re actually O+ (the most common blood type). Many can also not accurately remember whether they are + or - even if they know their correct ABO group. These are the most frequent mix-ups for some reason.

I’ve noticed this too. I think it’s just human nature to want to feel special or unique, even when it comes to something like blood type. The amount of people that I’ve seen claiming to be the universal donor is very disproportionate to the percentage of the US population that genuinely is O- (between 7 and 9 percent).

https://my.clevelandclinic.org/health/treatments/21213-blood-types

Maybe I’m selfish, but I’d rather be AB+ than O-. It’s more beneficial to the individual. O- can donate blood to anyone with any blood type, but AB+ can receive blood from anyone with any blood type. Those who are O- can only receive O- blood.

Anyone who is O- and needs a blood transfusion will be straight out of luck if they ever have a severe shortage of O-.

I’d rather be type A than be either of those. I believe studies have come out that identify type A as the blood type with the lowest risk for the majority of illnesses and as the most protective against viruses and infections. This was an area of interest and research during the COVID pandemic. I remember people talking about it. Unfortunately, I’m (along with my DH and kids) stuck with O. That genetic lottery business is brutal.

It might be a coincidence, but every single person that I know of who is type O has some sort of problem with some part of their digestive system/GI tract and experiences digestive symptoms. They usually struggle with spicy or acidic foods and dairy products. It doesn't matter how healthy they otherwise are. This is a common theme.

I LOLed reading this. My husband is O+. There’s so many common everyday foods that he cannot eat without ending up in the restroom for 5 hours afterward. The poor man cannot even have a bite of a cheeseburger and a sip of a milkshake without this happening. (He’s not even lactose intolerant.)

[Anonymous]

Anonymous wrote:

Anonymous wrote:

Anonymous wrote:

Anonymous wrote:

Anonymous wrote:

Anonymous wrote:As someone who works in the field, the likeliest explanation is that you mistakenly thought you were B- when you’re actually A-. We get a lot of patients that say they were mistyped. The scenario that usually ends up playing out is that they were incorrect about their blood type. When you have this job, you realize just how faulty the human memory can be.

We get a lot of people who think they’re B (+ or -) when they’re actually O (+ or -) or A (+ or -). We also get a lot who think they’re the universal donor (O-) when they’re actually O+ (the most common blood type). Many can also not accurately remember whether they are + or - even if they know their correct ABO group. These are the most frequent mix-ups for some reason.

I’ve noticed this too. I think it’s just human nature to want to feel special or unique, even when it comes to something like blood type. The amount of people that I’ve seen claiming to be the universal donor is very disproportionate to the percentage of the US population that genuinely is O- (between 7 and 9 percent).

https://my.clevelandclinic.org/health/treatments/21213-blood-types

Maybe I’m selfish, but I’d rather be AB+ than O-. It’s more beneficial to the individual. O- can donate blood to anyone with any blood type, but AB+ can receive blood from anyone with any blood type. Those who are O- can only receive O- blood.

Anyone who is O- and needs a blood transfusion will be straight out of luck if they ever have a severe shortage of O-.

I’d rather be type A than be either of those. I believe studies have come out that identify type A as the blood type with the lowest risk for the majority of illnesses and as the most protective against viruses and infections. This was an area of interest and research during the COVID pandemic. I remember people talking about it. Unfortunately, I’m (along with my DH and kids) stuck with O. That genetic lottery business is brutal.

It might be a coincidence, but every single person that I know of who is type O has some sort of problem with some part of their digestive system/GI tract and experiences digestive symptoms. They usually struggle with spicy or acidic foods and dairy products. It doesn't matter how healthy they otherwise are. This is a common theme.

What data do you have to show this is a "common theme"? I have O type blood, and no GI issues whatsoever, similar to my family members who are also type O. You may need to take a basic statistics and a basic biology class before spreading weird anecdotes.

This might be one of the weirder things to get offended over. The PP clearly said that it could be a coincidence and is based on the people (s)he knows. Data is not needed when you’re making a statement based on your own personal experience.

It rings true for my family.

[Anonymous]

Anonymous wrote:

Anonymous wrote:

Anonymous wrote:

Anonymous wrote:

Anonymous wrote:

Anonymous wrote:

Anonymous wrote:As someone who works in the field, the likeliest explanation is that you mistakenly thought you were B- when you’re actually A-. We get a lot of patients that say they were mistyped. The scenario that usually ends up playing out is that they were incorrect about their blood type. When you have this job, you realize just how faulty the human memory can be.

We get a lot of people who think they’re B (+ or -) when they’re actually O (+ or -) or A (+ or -). We also get a lot who think they’re the universal donor (O-) when they’re actually O+ (the most common blood type). Many can also not accurately remember whether they are + or - even if they know their correct ABO group. These are the most frequent mix-ups for some reason.

I’ve noticed this too. I think it’s just human nature to want to feel special or unique, even when it comes to something like blood type. The amount of people that I’ve seen claiming to be the universal donor is very disproportionate to the percentage of the US population that genuinely is O- (between 7 and 9 percent).

https://my.clevelandclinic.org/health/treatments/21213-blood-types

Maybe I’m selfish, but I’d rather be AB+ than O-. It’s more beneficial to the individual. O- can donate blood to anyone with any blood type, but AB+ can receive blood from anyone with any blood type. Those who are O- can only receive O- blood.

Anyone who is O- and needs a blood transfusion will be straight out of luck if they ever have a severe shortage of O-.

I’d rather be type A than be either of those. I believe studies have come out that identify type A as the blood type with the lowest risk for the majority of illnesses and as the most protective against viruses and infections. This was an area of interest and research during the COVID pandemic. I remember people talking about it. Unfortunately, I’m (along with my DH and kids) stuck with O. That genetic lottery business is brutal.

It might be a coincidence, but every single person that I know of who is type O has some sort of problem with some part of their digestive system/GI tract and experiences digestive symptoms. They usually struggle with spicy or acidic foods and dairy products. It doesn't matter how healthy they otherwise are. This is a common theme.

What data do you have to show this is a "common theme"? I have O type blood, and no GI issues whatsoever, similar to my family members who are also type O. You may need to take a basic statistics and a basic biology class before spreading weird anecdotes.

This might be one of the weirder things to get offended over. The PP clearly said that it could be a coincidence and is based on the people (s)he knows. Data is not needed when you’re making a statement based on your own personal experience.

It rings true for my family.

DP. Data is needed when you are making assertions about biology and disease. Obviously.

[Anonymous]

Anonymous wrote:

Anonymous wrote:As someone who works in the field, the likeliest explanation is that you mistakenly thought you were B- when you’re actually A-. We get a lot of patients that say they were mistyped. The scenario that usually ends up playing out is that they were incorrect about their blood type. When you have this job, you realize just how faulty the human memory can be.

We get a lot of people who think they’re B (+ or -) when they’re actually O (+ or -) or A (+ or -). We also get a lot who think they’re the universal donor (O-) when they’re actually O+ (the most common blood type). Many can also not accurately remember whether they are + or - even if they know their correct ABO group. These are the most frequent mix-ups for some reason.

Did everyone just skip over the part where OP said that she’s a blood donor and has a Red Cross donor card that says B-...?

This is what I'm wondering as well. Why is it being assumed that she forgot her own blood type?

[Anonymous]

Anonymous wrote:

Anonymous wrote:

Anonymous wrote:

Anonymous wrote:

Anonymous wrote:

Anonymous wrote:As someone who works in the field, the likeliest explanation is that you mistakenly thought you were B- when you’re actually A-. We get a lot of patients that say they were mistyped. The scenario that usually ends up playing out is that they were incorrect about their blood type. When you have this job, you realize just how faulty the human memory can be.

We get a lot of people who think they’re B (+ or -) when they’re actually O (+ or -) or A (+ or -). We also get a lot who think they’re the universal donor (O-) when they’re actually O+ (the most common blood type). Many can also not accurately remember whether they are + or - even if they know their correct ABO group. These are the most frequent mix-ups for some reason.

I’ve noticed this too. I think it’s just human nature to want to feel special or unique, even when it comes to something like blood type. The amount of people that I’ve seen claiming to be the universal donor is very disproportionate to the percentage of the US population that genuinely is O- (between 7 and 9 percent).

https://my.clevelandclinic.org/health/treatments/21213-blood-types

Maybe I’m selfish, but I’d rather be AB+ than O-. It’s more beneficial to the individual. O- can donate blood to anyone with any blood type, but AB+ can receive blood from anyone with any blood type. Those who are O- can only receive O- blood.

Anyone who is O- and needs a blood transfusion will be straight out of luck if they ever have a severe shortage of O-.

I’d rather be type A than be either of those. I believe studies have come out that identify type A as the blood type with the lowest risk for the majority of illnesses and as the most protective against viruses and infections. This was an area of interest and research during the COVID pandemic. I remember people talking about it. Unfortunately, I’m (along with my DH and kids) stuck with O. That genetic lottery business is brutal.

It might be a coincidence, but every single person that I know of who is type O has some sort of problem with some part of their digestive system/GI tract and experiences digestive symptoms. They usually struggle with spicy or acidic foods and dairy products. It doesn't matter how healthy they otherwise are. This is a common theme.

What data do you have to show this is a "common theme"? I have O type blood, and no GI issues whatsoever, similar to my family members who are also type O. You may need to take a basic statistics and a basic biology class before spreading weird anecdotes.

https://source.washu.edu/2016/08/study-may-explain-people-type-o-blood-likely-die-cholera/

https://academic.oup.com/jid/article-abstract/181/4/1364/856946?redirectedFrom=fulltext

https://link.springer.com/article/10.1007/BF02239355

https://scholar.google.com/scholar_lookup?journal=J%20Virol%20Microbiol&title=Relationship%20between%20ABO%20blood%20groups%20and%20Helicobacter%20pylori%20infection%20among%20patients%20with%20dyspepsia&author=GK%20Baqir&author=A%20Al-sulami&author=SS%20Hamadi&volume=2016&publication_year=2014&pages=1-18&

https://pmc.ncbi.nlm.nih.gov/articles/PMC5472337/

https://www.nature.com/articles/s41598-024-64476-9

https://pmc.ncbi.nlm.nih.gov/articles/PMC5742377/

https://www.longdom.org/open-access/association-between-abo-blood-group-and-clinical-outcomes-in-patients-with-gastrointestinal-bleeding-31410.html

https://pmc.ncbi.nlm.nih.gov/articles/PMC10351991/

[Anonymous]

https://academic.oup.com/jid/article-abstract/185/3/393/896165

https://academic.oup.com/aje/article-abstract/121/6/791/92191

https://www.health.harvard.edu/digestive-health/peptic-ulcer-overview

[Anonymous]

Anonymous wrote:

Anonymous wrote:

Anonymous wrote:

Anonymous wrote:

Anonymous wrote:

Anonymous wrote:As someone who works in the field, the likeliest explanation is that you mistakenly thought you were B- when you’re actually A-. We get a lot of patients that say they were mistyped. The scenario that usually ends up playing out is that they were incorrect about their blood type. When you have this job, you realize just how faulty the human memory can be.

We get a lot of people who think they’re B (+ or -) when they’re actually O (+ or -) or A (+ or -). We also get a lot who think they’re the universal donor (O-) when they’re actually O+ (the most common blood type). Many can also not accurately remember whether they are + or - even if they know their correct ABO group. These are the most frequent mix-ups for some reason.

I’ve noticed this too. I think it’s just human nature to want to feel special or unique, even when it comes to something like blood type. The amount of people that I’ve seen claiming to be the universal donor is very disproportionate to the percentage of the US population that genuinely is O- (between 7 and 9 percent).

https://my.clevelandclinic.org/health/treatments/21213-blood-types

Maybe I’m selfish, but I’d rather be AB+ than O-. It’s more beneficial to the individual. O- can donate blood to anyone with any blood type, but AB+ can receive blood from anyone with any blood type. Those who are O- can only receive O- blood.

Anyone who is O- and needs a blood transfusion will be straight out of luck if they ever have a severe shortage of O-.

I’d rather be type A than be either of those. I believe studies have come out that identify type A as the blood type with the lowest risk for the majority of illnesses and as the most protective against viruses and infections. This was an area of interest and research during the COVID pandemic. I remember people talking about it. Unfortunately, I’m (along with my DH and kids) stuck with O. That genetic lottery business is brutal.

It might be a coincidence, but every single person that I know of who is type O has some sort of problem with some part of their digestive system/GI tract and experiences digestive symptoms. They usually struggle with spicy or acidic foods and dairy products. It doesn't matter how healthy they otherwise are. This is a common theme.

What data do you have to show this is a "common theme"? I have O type blood, and no GI issues whatsoever, similar to my family members who are also type O. You may need to take a basic statistics and a basic biology class before spreading weird anecdotes.

If it doesn’t apply, let it fly.

[Anonymous]

Anonymous wrote:

Anonymous wrote:

Anonymous wrote:

Anonymous wrote:

Anonymous wrote:As someone who works in the field, the likeliest explanation is that you mistakenly thought you were B- when you’re actually A-. We get a lot of patients that say they were mistyped. The scenario that usually ends up playing out is that they were incorrect about their blood type. When you have this job, you realize just how faulty the human memory can be.

We get a lot of people who think they’re B (+ or -) when they’re actually O (+ or -) or A (+ or -). We also get a lot who think they’re the universal donor (O-) when they’re actually O+ (the most common blood type). Many can also not accurately remember whether they are + or - even if they know their correct ABO group. These are the most frequent mix-ups for some reason.

I’ve noticed this too. I think it’s just human nature to want to feel special or unique, even when it comes to something like blood type. The amount of people that I’ve seen claiming to be the universal donor is very disproportionate to the percentage of the US population that genuinely is O- (between 7 and 9 percent).

https://my.clevelandclinic.org/health/treatments/21213-blood-types

Maybe I’m selfish, but I’d rather be AB+ than O-. It’s more beneficial to the individual. O- can donate blood to anyone with any blood type, but AB+ can receive blood from anyone with any blood type. Those who are O- can only receive O- blood.

Anyone who is O- and needs a blood transfusion will be straight out of luck if they ever have a severe shortage of O-.

I’d rather be type A than be either of those. I believe studies have come out that identify type A as the blood type with the lowest risk for the majority of illnesses and as the most protective against viruses and infections. This was an area of interest and research during the COVID pandemic. I remember people talking about it. Unfortunately, I’m (along with my DH and kids) stuck with O. That genetic lottery business is brutal.

It might be a coincidence, but every single person that I know of who is type O has some sort of problem with some part of their digestive system/GI tract and experiences digestive symptoms. They usually struggle with spicy or acidic foods and dairy products. It doesn't matter how healthy they otherwise are. This is a common theme.

My grandmother (mom's mother) had to have her gallbladder surgically removed at a relatively young age. My grandfather (dad's father) had both GERD and peptic ulcers together. Both had type O blood.

[Anonymous]

I have Barretts. Type A+

[Anonymous]

Anonymous wrote:I’m just wondering if anyone else has experienced something similar. I’m pregnant. Before pregnancy, my blood type was B-. I know this for certain because I have been a blood donor for years, and it says B- on my blood donor card and Red Cross app. When I had my blood drawn recently, I was told that I’m A-. My parents (also donors) are type B and type O, so it’s also genetically impossible for me to be type A. My doctor has told me that it’s not possible for your blood type to change if you have never had a blood transfusion or bone marrow transplant. She seemed sure that I’m A-.

It doesn’t really matter in the grand scheme of things, but my curiosity has been peaked. I wonder if pregnancy can cause something like this and if it will be temporary or permanent.

Actually, it does matter.

[Anonymous]

Anonymous wrote:

Anonymous wrote:

Anonymous wrote:

Anonymous wrote:

Anonymous wrote:

Anonymous wrote:

Anonymous wrote:As someone who works in the field, the likeliest explanation is that you mistakenly thought you were B- when you’re actually A-. We get a lot of patients that say they were mistyped. The scenario that usually ends up playing out is that they were incorrect about their blood type. When you have this job, you realize just how faulty the human memory can be.

We get a lot of people who think they’re B (+ or -) when they’re actually O (+ or -) or A (+ or -). We also get a lot who think they’re the universal donor (O-) when they’re actually O+ (the most common blood type). Many can also not accurately remember whether they are + or - even if they know their correct ABO group. These are the most frequent mix-ups for some reason.

I’ve noticed this too. I think it’s just human nature to want to feel special or unique, even when it comes to something like blood type. The amount of people that I’ve seen claiming to be the universal donor is very disproportionate to the percentage of the US population that genuinely is O- (between 7 and 9 percent).

https://my.clevelandclinic.org/health/treatments/21213-blood-types

Maybe I’m selfish, but I’d rather be AB+ than O-. It’s more beneficial to the individual. O- can donate blood to anyone with any blood type, but AB+ can receive blood from anyone with any blood type. Those who are O- can only receive O- blood.

Anyone who is O- and needs a blood transfusion will be straight out of luck if they ever have a severe shortage of O-.

I’d rather be type A than be either of those. I believe studies have come out that identify type A as the blood type with the lowest risk for the majority of illnesses and as the most protective against viruses and infections. This was an area of interest and research during the COVID pandemic. I remember people talking about it. Unfortunately, I’m (along with my DH and kids) stuck with O. That genetic lottery business is brutal.

It might be a coincidence, but every single person that I know of who is type O has some sort of problem with some part of their digestive system/GI tract and experiences digestive symptoms. They usually struggle with spicy or acidic foods and dairy products. It doesn't matter how healthy they otherwise are. This is a common theme.

What data do you have to show this is a "common theme"? I have O type blood, and no GI issues whatsoever, similar to my family members who are also type O. You may need to take a basic statistics and a basic biology class before spreading weird anecdotes.

https://source.washu.edu/2016/08/study-may-explain-people-type-o-blood-likely-die-cholera/

https://academic.oup.com/jid/article-abstract/181/4/1364/856946?redirectedFrom=fulltext

https://link.springer.com/article/10.1007/BF02239355

https://scholar.google.com/scholar_lookup?journal=J%20Virol%20Microbiol&title=Relationship%20between%20ABO%20blood%20groups%20and%20Helicobacter%20pylori%20infection%20among%20patients%20with%20dyspepsia&author=GK%20Baqir&author=A%20Al-sulami&author=SS%20Hamadi&volume=2016&publication_year=2014&pages=1-18&

https://pmc.ncbi.nlm.nih.gov/articles/PMC5472337/

https://www.nature.com/articles/s41598-024-64476-9

https://pmc.ncbi.nlm.nih.gov/articles/PMC5742377/

https://www.longdom.org/open-access/association-between-abo-blood-group-and-clinical-outcomes-in-patients-with-gastrointestinal-bleeding-31410.html

https://pmc.ncbi.nlm.nih.gov/articles/PMC10351991/

I have had 7 blood transfusions over a period of 20 years and my blood type is still the same. The only thing that has changed is that I have to have the blood warmed during the transfusion for which there is specific equipment.


FYI AI generated

"While blood types are inherited and generally stay the same for life, they can change in very rare, specific, and usually severe medical circumstances. These changes are typically temporary, though sometimes permanent, often resulting from bone marrow transplants, specific cancers (like leukemia), or rare bacterial infections that affect red blood cell antigens."

[Anonymous]

Anonymous wrote:

Anonymous wrote:

Anonymous wrote:

Anonymous wrote:

Anonymous wrote:As someone who works in the field, the likeliest explanation is that you mistakenly thought you were B- when you’re actually A-. We get a lot of patients that say they were mistyped. The scenario that usually ends up playing out is that they were incorrect about their blood type. When you have this job, you realize just how faulty the human memory can be.

We get a lot of people who think they’re B (+ or -) when they’re actually O (+ or -) or A (+ or -). We also get a lot who think they’re the universal donor (O-) when they’re actually O+ (the most common blood type). Many can also not accurately remember whether they are + or - even if they know their correct ABO group. These are the most frequent mix-ups for some reason.

I’ve noticed this too. I think it’s just human nature to want to feel special or unique, even when it comes to something like blood type. The amount of people that I’ve seen claiming to be the universal donor is very disproportionate to the percentage of the US population that genuinely is O- (between 7 and 9 percent).

https://my.clevelandclinic.org/health/treatments/21213-blood-types

Maybe I’m selfish, but I’d rather be AB+ than O-. It’s more beneficial to the individual. O- can donate blood to anyone with any blood type, but AB+ can receive blood from anyone with any blood type. Those who are O- can only receive O- blood.

Anyone who is O- and needs a blood transfusion will be straight out of luck if they ever have a severe shortage of O-.

I’d rather be type A than be either of those. I believe studies have come out that identify type A as the blood type with the lowest risk for the majority of illnesses and as the most protective against viruses and infections. This was an area of interest and research during the COVID pandemic. I remember people talking about it. Unfortunately, I’m (along with my DH and kids) stuck with O. That genetic lottery business is brutal.

It might be a coincidence, but every single person that I know of who is type O has some sort of problem with some part of their digestive system/GI tract and experiences digestive symptoms. They usually struggle with spicy or acidic foods and dairy products. It doesn't matter how healthy they otherwise are. This is a common theme.

O- with severe digestive issues here. 🙋🏼‍♀️

[Anonymous]

Anonymous wrote:

Anonymous wrote:

Anonymous wrote:

Anonymous wrote:As someone who works in the field, the likeliest explanation is that you mistakenly thought you were B- when you’re actually A-. We get a lot of patients that say they were mistyped. The scenario that usually ends up playing out is that they were incorrect about their blood type. When you have this job, you realize just how faulty the human memory can be.

We get a lot of people who think they’re B (+ or -) when they’re actually O (+ or -) or A (+ or -). We also get a lot who think they’re the universal donor (O-) when they’re actually O+ (the most common blood type). Many can also not accurately remember whether they are + or - even if they know their correct ABO group. These are the most frequent mix-ups for some reason.

I’ve noticed this too. I think it’s just human nature to want to feel special or unique, even when it comes to something like blood type. The amount of people that I’ve seen claiming to be the universal donor is very disproportionate to the percentage of the US population that genuinely is O- (between 7 and 9 percent).

https://my.clevelandclinic.org/health/treatments/21213-blood-types

Maybe I’m selfish, but I’d rather be AB+ than O-. It’s more beneficial to the individual. O- can donate blood to anyone with any blood type, but AB+ can receive blood from anyone with any blood type. Those who are O- can only receive O- blood.

Anyone who is O- and needs a blood transfusion will be straight out of luck if they ever have a severe shortage of O-.

I’d rather be type A than be either of those. I believe studies have come out that identify type A as the blood type with the lowest risk for the majority of illnesses and as the most protective against viruses and infections. This was an area of interest and research during the COVID pandemic. I remember people talking about it. Unfortunately, I’m (along with my DH and kids) stuck with O. That genetic lottery business is brutal.

Wrong, unfortunately! Blood type A is hands down associated with the most health issues- increased risk of many cancers, heart disease, and severe Covid too.

[Anonymous]

Has no one suggested fetal maternal microchemerism? It’s not impossible. An error seems more likely though.
But this is definitely worth more follow up.