Reply to Only ~14% Of U.S. Adults Have Gotten Latest Covid-19 Vaccine Update

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Reply to "Only ~14% Of U.S. Adults Have Gotten Latest Covid-19 Vaccine Update"

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[quote=Anonymous]The NIS survey’s overstatement of adult covid vaccine uptake is not a new phenomenon. A similar overstatement occurred with the 2022 bivalent booster; actual CDC vaccine data showed 21% of adults having received the bivalent booster by May 10, 2023 while the NIS-ACM reported 29% uptake at the same point in time – an eight percentage point overstatement. That is nearly identical to the amount that the NIS-ACM appears to be overestimating uptake of the current covid booster as well, relative to state data. Given that this a known and recurrent problem, why is the CDC using NIS-ACM data to brief APIC on booster uptake? It is particularly odd since the CDC has access to a more reliable IQVIA series that is based on actual covid vaccination data and not based on unreliable, self-reported data from phone surveys.

2022-23 Bivalent booster uptake (adults) – actual vs NIS phone survey
https://covid.cdc.gov/covid-data-tracker/#vaccinations_vacc-people-booster-percent-pop18
https://data.cdc.gov/Vaccinations/National-Immunization-Survey-Adult-COVID-Module-NI/akkj-j5ru/data_preview
(The latter NIS database reports bivalent uptake for adults who had received the primary covid vaccine series. Use an 84% estimate for adult uptake of the primary series to derive the overall adult bivalent uptake.)[/quote]

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