Scientists see downsides to top COVID-19 vaccines from Russia, China

Scientists see downsides to top COVID-19 vaccines from Russia, China

TORONTO/CHICAGO (Reuters) – High-profile COVID-19 vaccines developed in Russia and China share a potential shortcoming: They are based on a common cold virus that many people have been exposed to, potentially limiting their effectiveness, some experts say. CanSino Biologics’ vaccine, approved for military use in China, is a modified form of adenovirus type 5, or Ad5.

By Miki