Ask DerrickTo view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video05/18/2021May 18, 2021We ask our science correspondent Derrick Williams about whether someone who has been vaccinated and feels some side effects is contagious to others.https://p.dw.com/p/3tZrtAdvertisementTitle: Kurztitel: Ask Derrick Teaser: Keywords: