Aaron E. Carroll, a professor of pediatrics, writes that some danger will still exist when things return to “normal.” When the vaccine was first offered, many of my peers had questions. Loreto Ferri, 51, who sports a gray pushback hairdo, has been in nearly 17 years for robbing banks with notes. His nickname, which his grandmother gave him years ago, is Cheech; he’s a bit bitter because in January he was denied parole for the third time, just as a wave of Covid-19 came to Sullivan. When the corrections officer offered the vaccine initially, Cheech said he would take it, he told me. Then a few weeks later he told me that “with these blood clots” and other things he was hearing, he was having second thoughts, adding that he thought he had already had Covid-19 last year.