If enough people in the U.S. pass on vaccine, the nation may not be able to achieve herd immunity
Fifty percent of phase 3 clinical trials and 100 percent of vaccine trials at risk for excluding older adults
If enough people in the U.S. pass on vaccine, the nation may not be able to achieve herd immunity
Fifty percent of phase 3 clinical trials and 100 percent of vaccine trials at risk for excluding older adults