IE 11 is not supported. For an optimal experience visit our site on another browser.

Herd immunity conversations not helpful to vaccine efforts, Dr. Besser says

04:28

Dr. Richard Besser, former CDC director and current president and CEO of the Robert Wood Johnson Foundation, joins TODAY to talk about herd immunity, vaccination efforts and the expectation that kids ages 12-15 will be able to receive the Pfizer vaccine very soon.