Description

Concepts Covered: Vaccine efficacy against variants chart, is pfizer effective against delta variant. For more such videos go to https://www.youtube.com/channel/UCfzShJ0nammXRADOy3fMPTg
Health & Safety Are the available vaccines capable of fighting the variants?
1 min(s)
31 Jan 2022
Pratham Open School
Class 9
Marathi
Video
Concept Video