RT Journal Article SR Electronic T1 How to avoid getting COVID-19: a guide for the perplexed JF Postgraduate Medical Journal JO Postgrad Med J FD The Fellowship of Postgraduate Medicine SP 730 OP 732 DO 10.1136/pmj-2022-142124 VO 98 IS 1163 A1 Launer, John YR 2022 UL http://pmj.bmj.com/content/98/1163/730.abstract AB