coronaviruses before covid-19 existed. casey colbert was ready last january to quickly develop a vaccine model that moderna used for their covid-19 vaccine. doctor covid has already saved hundreds of millions of lives with the moderna vaccine, and sometimes she has to do it one shot at a time. doctor core bit met matthew mallory at msnbc s town hall, vaccinating america three weeks ago, but was unable to convince him that night to get the vaccine. then a week later, matthew and his mother, dr. joan cephas met dr. accorded at a walgreens in virginia, where doctor core bit watched as they both received the moderna vaccine that she had helped develop. here s our interview with dr. key zeke orbit, matthew mallory, and dr. joan cephas at the