Reply to Has your daycare had a COVID positive?

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[quote=Anonymous][quote=Anonymous]I think a better question is whether, when there is a case, it has spread at the school. [b]That tells you whether the precautions the school is taking are working or not. [/b]Our school (in Arlington) has had one case. It didn’t spread. The school two blocks away had one case that quickly became 4 cases and then they shut down the school for two weeks (which was wise). I don’t know if it spread any further or not.[/quote]

Eh I think there is too much randomness and luck involved. Some people spread the virus much more than others for poorly understood reasons.

[i]Though the general mechanics that create respiratory aerosols are the same among people, a large amount of variation exists between how much spray individuals actually produce. Look at a crowd of people standing by a bus stop on a cold day, and you’ll notice everyone’s breath fog looks different in terms of size.

This shouldn’t be surprising, considering the complexity of the respiratory tract. Morawska uses the analogy of a perfume bottle’s more uniform mist: “Unlike in the perfume bottle, where there’s only one tube, there’s many different passages in the respiratory tract—passages of different widths and different lengths.”

To quantify this complexity even for a single person would be cumbersome, but scientists can still spot those who excel at making aerosols. In a 2019 study, Ristenpart and his colleagues showed that the louder someone speaks, the more aerosols they emit. However, the scientists also found that some participants in their study produced an order of magnitude more aerosols than others–even when speaking at the same volume. These people have become known as superemitters.[/i]
https://www.nationalgeographic.com/science/2020/10/why-people-are-coronavirus-superspreaders-how-body-emits-infectious-particles/#close[/quote]

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