https://www.siliconvalley.com/2021/07/19/covid-vaccination-rates-lag-outbreaks-spread-in-bay-area-homeless-shelters/

Even as the Bay Area celebrates high COVID vaccination rates, the region is falling drastically short in efforts to inoculate thousands of people living on the street, in vehicles and in homeless shelters.

In some counties, unhoused people are getting vaccinated at close to half the rate of the general population. Other counties aren’t even tracking vaccination rates in homeless communities, making it all but impossible to gauge their success and target areas for improvement.