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Since a COVID-19 vaccine appears to be a year away, “herd immunity” is the best hope for combating coronavirus – but, the practice of “social distance” is getting in the way, a leading health expert tells “Life, Liberty and Levin” Host Mark Levin in a video previewing the full interview airing Sunday, April 19, 2020 at 8:00PM ET on Fox News Channel.

Herd immunity “is the best way to get to a place where grandparents can once again hug their grandchildren,” Dr. David Katz, the founding director of the Yale-Griffin Prevention Research Center in Connecticut, tells Levin.

Herd immunity is where enough people – most of whom will have very minor, or no, symptoms – contract COVID-19, develop antibodies against it, and recover. Since those who have the antibodies can neither get, nor pass on, coronavirus, it runs into more and more “dead ends” as it tries to spread.

"It finds it harder to get to a host where it can survive and it dies out," Dr. Katz says. "That's herd immunity."

“It looks to me like that is the best way to get to a place where grandparents can once again hug their grandchildren,” Dr. Katz concludes.