Anthony S. Fauci, the nation’s top infectious-diseases doctor said today:
“The fact that an eventual vaccine for the coronavirus may be only 70%-75% effective and the likelihood that many people will not receive it make the US unlikely to achieve herd immunity.”
“The best we’ve ever done is measles, which is 97%-98% effective. That would be wonderful if we get there. I don’t think we will. I would settle for [a] 70%, 75% effective vaccine.”
About 70% of U.S. residents say they plan to get a coronavirus vaccine if it’s free and available, according to
a Washington Post-ABC News poll released this month. Similarly, about two-thirds of the population said the same in
a CNN poll.
Fauci was asked whether a 70%-75% effective vaccine taken by two-thirds of people in the country would create herd immunity.
“No — unlikely,” he responded.
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Fauci also said that contact tracing is going poorly in the US in part because many communities are trying to do it by phone. About half of people who answer the calls don’t want to talk to anyone in a position of authority.
Asymptomatic transmission also makes contact tracing difficult, Fauci added. He said 20%-40% of people carrying the virus may not have symptoms.
“So the standard classic paradigm of identification, isolation, contact tracing doesn’t work, no matter how good you are, because you don’t know who you’re tracing,” Fauci said.
https://www.google.com/amp/s/www.washingtonpost.com/nation/2020/06/28/coronavirus-live-updates-us/?outputType=amp