the moderna vaccine to certain people, saying there's evidence it can still be effective that way for many. the food and drug administration is expected to meet this week to discuss the issue. well, california is the epicenter of the pandemic in the u.s. right now. the chief medical officer of one hospital system says another spike could bring about the total collapse of the health care system. cnn's paul vercammen has more now from los angeles. >> reporter: just no easing up of the desperate covid-19 situation in california. more than 45,000 new cases, more than 20,000 people in the hospital, 181 new deaths. president trump tweeted that the cases are being exaggerated, calling covid-19 fake news. that did not sit well with rosa serna. she was at a cemetery mourning