At least 233 staff members at two major San Francisco hospitals, most of them fully vaccinated, tested positive for the coronavirus this month. About 75 to 80 percent of the more than 50 staff members infected at Zuckerberg San Francisco General Hospital were fully vaccinated, Dr. Lukejohn Day, the hospital’s chief medical officer, said in an interview on Saturday. The University of California, San Francisco Medical Center said in a statement issued on Friday that 153 of its 183 infected staff members had been fully vaccinated.
