Johnson & Johnson Says It Could Have 20 Million Single-Dose Vaccine Units By End Of March

It's a big week for the Johnson & Johnson coronavirus vaccine. The FDA deemed it safe and effective today, and it appears to be more effective than originally reported against the newer, more infectious variants of the coronavirus. That brings the vaccine a critical step closer to being authorized for emergency use. Johnson and Johnson says it could have 20 million units of its single-dose vaccine available by the end of March.

We speak about what this means with Dr. Dan Barouch, the director of the Center for Virology and Vaccine Research at Beth Israel Deaconess Medical Center. His lab helped design the Johnson & Johnson vaccine. We also speak with WBUR's Carey Goldberg, one last time, about the latest vaccine and coronavirus news.