WHYY By A man gets the Pfizer COVID-19 vaccine at a vaccination hub in San Marino, Friday, April 9, 2021. (AP Photo/Antonio Calanni) This is one of a series of articles in which reporters from WHYY’s Health Desk Help Desk answer questions about vaccines and COVID-19 submitted by you, our audience. “What the Biden administration is doing is implicitly pressuring the states to get vaccinations into as many arms as possible. And the idea is that the more vaccinated people that we have, the quicker that we can get to this concept of community immunity,” Drexel epidemiologist Neal Goldstein told WHYY News.