PT - JOURNAL ARTICLE AU - Wang, Samuel Sherng Young TI - Post BNT162b2 mRNA COVID-19 vaccination Henoch-SchÓ§nlein Pupura AID - 10.1136/postgradmedj-2021-141407 DP - 2022 Jan 12 TA - Postgraduate Medical Journal PG - postgradmedj-2021-141407 4099 - http://pmj.bmj.com/content/early/2022/01/12/postgradmedj-2021-141407.short 4100 - http://pmj.bmj.com/content/early/2022/01/12/postgradmedj-2021-141407.full