A Johns Hopkins University health care expert is available to offer perspective on the news that a mistake at a Johnson & Johnson factory producing the COVID-19 vaccine resulted in the loss of millions of doses.

A Johns Hopkins University health care expert is available to offer perspective on the news that a mistake at a Johnson & Johnson factory producing the COVID-19 vaccine resulted in the loss of millions of doses.

Tinglong Dai is an associate professor at the Carey Business School. Dai is a health care analytics expert who has closely focused on management and operations issues during the vaccine rollout.

withyou android app