This is a do-or-die week in San Diego for fighting the coronavirus here, and it’s crucial for everyone to stay home, says a local scientist whose stark warning about the potential for catastrophe spread across social media on Tuesday. “There are going to be a lot of people carrying and shedding the virus sometime this week … Taking everything together, this is a terrible week to be around other people,” wrote Forest Rohwer, a scientist who studies viruses at San Diego State University, in an