Just browsing the news bumped into two unrelated stories today, from small town California to large.
Los Angeles is one of the biggest school districts in the country.
LAUSD Is Handing Out Rapid Tests For Baseline COVID Testing; The district requires all students and staff to have the negative COVID-19 test for a baseline in addition to weekly testing. - https://laist.com/news/education/lausd-is-handing-out-rapid-tests-for-baseline-testing-heres-where-to-go
Mendocino County schools ahead of the curve in distributing COVID tests - https://www.ukiahdailyjournal.com/2022/01/07/mendocino-county-schools-ahead-of-the-curve-in-distributing-covid-tests/
That's one of the reasons I've had to explain to people that these vaccines can't prevent infection. The Media is intentionally confusing infection with noticeable illness and even hospitalization.