Explaining the AstraZeneca COVID-19 Vaccine: How Does It Work and Is It Safe?

The AstraZeneca COVID-19 vaccine has been suspended by some European countries after blood clots were reported in some patients who received it. Regulators are now working to determine if those clots were due to the vaccine or just coincidental. Dr. Michelle McMurry-Heath, an immunologist and CEO of the Biotechnology Innovation Organization, explains how the AstraZeneca differs from the other available vaccines and why she believes it will be ruled safe.