Video-Virus Outbreak-Vaccine Explainer November 14, 2020 GNCadm1n Science / Health Comments Off on Video-Virus Outbreak-Vaccine Explainer VIRUS OUTBREAK-VACCINE EXPLAINER — Video. This animated video explains how Pfizer’s genetic vaccine works against COVID-19. This animated explainer is current as of Nov. 10, 2020 and will not be updated. Source: AP reports.