coronavirus May 9, 2023 5:13 pm UCSF Researchers Study Degrees of COVID-19 Vaccine Protection When it comes to protection over time, some COVID-19 vaccines perform better than others, according to a UCSF study. Marianne Favro reports. US & World Videos 4:02 Updated COVID vaccines coming 3:17 Slight summer uptick of COVID cases in California 3:57 Interview: Doctor's perspective on COVID 4 years after shutdown started 2:09 CDC updates COVID isolation guidelines 1:37 Study examines effectiveness of main COVID treatment Paxlovid
