SAN JOSE, Calif. — Here we go again?
COVID-19 cases and hospitalizations are rising once again across the country, driven by more contagious subvariants of the virus and leaving health experts unsure whether vaccination and immunity from prior infection will be protective enough to prevent yet another deadly wave of infections.
Nearly a third of the country is now registering substantial or high levels of COVID-19 transmission in the last seven days, including most Bay Area counties at the high level, according to the Centers for Disease Control and Prevention.
