J&J, AstraZeneca may alter vaccines because of rare blood clots; California softens school rules, still requires masks: Live COVID news
Elinor Aspegren and Steven Vargas, USA TODAYComments Off on J&J, AstraZeneca may alter vaccines because of rare blood clots; California softens school rules, still requires masks: Live COVID news
Johnson & Johnson and AstraZeneca conducting research into whether changes in their vaccines could eliminate rare blood clots. Latest COVID news.