Kids weren't vaccinated.
A large unvaccinated reservoir population in constant contact with the vaccinated population is how you breed variants that are, e.g., more dangerous to young people (like Delta already is) and more likely to break through existing vaccines (which Delta also is, though not intensely so from the information I've seen.)
Remote teaching sucks for many reasons for kids and should be used only when really unavoidable, but to claim kids are a-OK and shouldn't be vaccinated ain't based on science I've read so far.
> Although children can be infected with SARS-CoV-2, can get sick from COVID-19, and can spread the virus to others, less than 10% of COVID-19 cases in the United States have been among children and adolescents aged 5–17 years (COVID Data Tracker). Compared with adults, children and adolescents who have COVID-19 are more commonly asymptomatic (never develop symptoms) or have mild, non-specific symptoms.
> Some studies have found that it is possible for communities to reduce incidence of COVID-19 while keeping schools open for in-person instruction.
> Evidence suggests that staff-to-staff transmission is more common than transmission from students to staff, staff to student, or student to student.
> A study comparing county-level COVID-19 hospitalizations between counties with in-person learning and those without in-person learning found no effect of in-person school reopening on COVID-19 hospitalization rates when baseline hospitalization rates were low or moderate.
SF has some of the lowest infection rates in the country. So there is no scientific reason to keep schools closed when you see the harm it is causing disadvantaged families.
