When do side effects happen from COVID-19 vaccines?
Science unscripted - A podcast by DW.COM | Deutsche Welle

Side effects from COVID-19 vaccines are really, really rare. But, if you're one of the unlucky ones, when would you find out? Also, the "supermarket question" has now been answered, and a few dozen mice had BioNTech-Pfizer injected right into their tails — and may have helped solve the heart inflammation mystery.