In Newsweek
From my article in Newsweek, posted Jan. 28, 2021
The virus is changing. It has already mutated into versions that spread more quickly, may kill more efficiently and threaten to undermine the effectiveness of vaccines. The nightmare scenario: the virus mutates into a variant that renders current vaccines weakened or obsolete before the rollout reaches the 150 million or so people needed to achieve herd immunity, which would halt the virus in its tracks….Read more
David H. Freedman 