World / Science & Health | FOCUS Aug 31, 2020
Scientists see downsides to top COVID-19 vaccines from Russia and China
by Allison Martell and Julie Steenhuysen
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 ...