What is Up with the New Covid Variants and How Dangerous are They?

China and the US are among the countries that have been affected by the new COVID variant.

China and the US are among the countries that have been affected by the new COVID variant. NewsClick Editor-in-Chief Prabir Purkayastha talks to immunologist Dr. Satyajit Rath about these variants, their impact, and what it means for public health authorities.