Dr. Anthony Fauci slammed herd immunity as “nonsense” in two interviews on Thursday morning, charging that allowing the coronavirus to spread among young, healthy people, an approach that aims for “immunity” through infection rather than a vaccine, is not viable.

In an interview with ABC’s Good Morning America, Fauci called it “ridiculous” to support an approach in which “you just let things rip and let the infection go — no masks, crowds,” adding, “You’ll wind with many more infections of vulnerable people, which will lead to hospitalizations and deaths.”