President Joe Biden’s goal of having 70 percent of American adults vaccinated against the virus that causes COVID-19 by July 4 is not the same as the threshold for herd immunity, the director of the Centers for Disease Control and Prevention said Thursday.
“We know that the more and more people who get one vaccine and then two, get fully vaccinated, the more we as a nation are protected,” Dr. Rochelle Walensky, the director, said during an appearance on NBC’s “Today” show.
