Summary: As society reopens and vaccinations spread, COVID-19 is on the run. But as Chronicle reporter Annie Vainshtein reports, health experts say the Bay Area may see a fourth pandemic surge — thanks to more contagious variants, the relaxing of rules and spring break. Also, sports writer Ron Kroichick talks about fans returning to Giants and A's games, and whether that's a good idea. | Unlimited Chronicle access: sfchronicle.com/pod Learn more about your ad choices. Visit megaphone.fm/adchoices
