Coronavirus cases, hospitalizations and deaths have all been declining in LA County. Dr. George Rutherford, professor of epidemiology at UC San Francisco, says cases in Southern California are dropping quickly because of naturally acquired immunity from so many infections, and people are wearing masks and social distancing.

“The rollout of vaccines has sort of tipped the balance. And I think we're going to continue to see this as long as things don't go wrong,” he adds.

Rutherford also says teenagers should be the focus of vaccinations because they’re most likely to transit COVID-19.