More than 38 million people globally have been infected by COVID-19 and more than a million have died.
Scientists are studying the virus at an unprecedented pace, and their knowledge base has grown since March. But much is still unknown.
Today on All Sides with Ann Fisher, COSI president and CEO, immunologist Frederic Bertley explains the latest revelations and what remains a mystery.
- Frederic Bertley, immunologist, president and CEO, Center of Science and Industry (COSI)