Home / US / Covid-19 vaccine may not provide herd immunity if too many people refuse to get it, says Fauci

Covid-19 vaccine may not provide herd immunity if too many people refuse to get it, says Fauci



With government support, three coronavirus vaccines are expected to be studied in large-scale clinical trials over the next three months.

“The best we’ve ever done is measles, which is 97 to 98 percent effective,” said Fauci, director of the National Institute of Allergy and Infectious Diseases. “It would be wonderful if we got there. I don’t think we will. I would settle for [a] 70, 75% effective vaccine. “

In an interview on Friday, CNN asked Fauci whether a vaccine with an efficiency between 70 and 75%, taken by only two thirds of the population, would provide immunity to coronavirus.

“No – unlikely,” he replied.

Herd immunity occurs when a sufficient proportion of a population is immune from an infectious disease, either through a previous disease or vaccination, in order to spread from person to person.

Coronavirus vaccine education effort “won̵
7;t be easy”

Fauci noted that “there is a general anti-science, anti-authority and anti-vaccine sentiment among some people in this country – an alarming percentage of people, relatively speaking.”

He said that given the power of the anti-vaccine movement, “we have a lot of work to do” to educate people about the truth about vaccines.

Scientists worry & # 39; Operation Warp Speed ​​& # 39; there is no proven and true vaccine

“It won’t be easy,” he said. “Anyone [who] think it will be easy not to face reality. It will be very difficult. “

Fauci said the government has a vaccine education program to thwart anti-vaccine messages.

“We currently have a program that will be broad in reaching the community,” he said. “You may not like a suit and tie government person like me, even if I tell you. They really need to see people they can relate to in the community – sports characters, community heroes, people who look up for. “

But there is no indication that such a program is in place.

U.S. Centers for Disease Control and Prevention run many federal health education programs, but agency spokeswoman Kristen Nordlund has referred CNN to the U.S. Department of Health and Human Services, which runs the Warp Speed ​​operation. , the Trump Administration’s effort to develop a Covid-19 vaccine.

In an email, Michael Caputo, an HHS spokesman, did not confirm the existence of a vaccine education campaign, adding that “I would not like to see CNN released [a] wildly wrong story. “

Fauci gives some states a C for coronavirus efforts

Fauci commented on the vaccines during a wide-ranging interview with CNN that was part of the Aspen Ideas Festival and aired Sunday evening.,

When asked what vote he would give the country to manage the coronavirus epidemic, Fauci said some states were doing better than others.

“Some states will be A +. Some will be A and others will drop to C somewhere,” he said.

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He chose New York to do “really well”, but he refused to name “C” states.

“There are some states where leadership and decision making [to open up] it was a little too hasty, “he said.” There are others when the leadership has done well, but the citizens have not listened to them.

Fauci said in states where it is possible to see people gathering closely without using masks, “this is a recipe for disaster.”

He added that he understands that people, especially young people, want to be together after months of blockade. He warned those people that “they are not in a vacuum”.

“The fact that you got infected means that you are likely to infect someone else who could infect someone else who will then infect a vulnerable person,” said Fauci. “That person could be someone’s uncle, aunt, grandmother, a child with immunosuppressed leukemia. All people who have a serious danger of poor results.”

The contact track isn’t going well, says Fauci

Contact Tracking 101: How It Works, Who Could Be Hired, and Why It Is So Critical To Fighting Coronavirus Now

Until there is a vaccine, a key to controlling the virus is contact traceability, the public health practice of trying to contain an outbreak by isolating infected people, asking them with whom they had contacts while they were infected and therefore quarantining those contacts.

Asked how the United States is doing with contact search, Fauci replied, “I don’t think we’re doing very well.”

“If you join the community and call and say” how is the contact track going? “The points aren’t connected because a lot is done on the phone. You make a contact, 50% of the people because you come from an authority don’t even want to talk to you,” he said.

He recommended that communities “put their shoes on the ground and go out there to look for people, instead of getting on the phone and making the so-called telephone tracing contact.”

But he added that contact tracking is hindered by the fact that so many people who are infected with coronavirus have no symptoms and, since they don’t know they are sick, it is impossible to trace their contacts.

He said in areas where the virus is spreading in the community, 20% to 40% of those infected are asymptomatic.

“When it spreads to the community, it is insidious because there are so many people in the community who are infected but asymptomatic,” he said. “So the classic standard paradigm of identification, isolation, contact tracking doesn’t work, no matter how good you are because you don’t know who you’re tracking.”


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