What herd immunity actually is: Infectious diseases physician explains

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White House coronavirus advisor Dr. Scott Atlas is denying a Washington Post report that he’s urging the administration to adopt a “herd immunity” strategy. Infectious diseases physician and medical doctor of the special pathogens unit at Boston Medical Center, Dr. Nahid Bhadelia joins Geoff Bennett to explain exactly what herd immunity is and why we must consider the risk of re-infection.