[error_logic]

Nuance: They're still getting exposed and thus gaining immunity with the environmental filtering, just not so much viral load as to be out of school [as often].

It's a win-win from that perspective and dismissing that serves no one in the end.

[Sakos]

This tiny but significant factor is also why masks, even surgical masks, are so helpful. They don't need to prevent 100% transmission, just reduce the viral load received or passed on.