Health experts cast doubt on India's timeline for COVID-19 vaccine
Dozens of vaccine candidates are at various stages of development around the world to tackle the coronavirus pandemic.
Vial 1 of Box 1. This is the vaccine candidate to be used in Phase 1 clinical trial at the Clinical Biomanufacturing Facility (CBF) in Oxford, Britain, April 2, 2020. Picture taken April 2, 2020(photo credit: SEAN ELIAS/HANDOUT VIA REUTERS)ByREUTERS
