News Search

“That was the critical time,” said Jeffrey Shaman, an infectious disease expert at Columbia University. “That was the opportune moment that was lost.”

No new details have emerged since to change the authors' minds, said Dr. W. Ian Lipkin, one of the co-authors and a professor at the Columbia University Mailman School of Public Health.

Editor's Note: Wafaa El-Sadr, a co-author of this article, is a professor of epidemiology and medicine and the director of ICAP.