Last Friday, I hurried to the hospital to receive my second Pfizer COVID-19 vaccination, which must be administered 21 days after the first. I harbored some trepidation about possible adverse events, which are more common with the shot. Something very unexpected happened. You can read about it here: https://www.kevinmd.com/blog/2021/01/an-unexpected-covid-19-vaccine-side-effect.html