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Can the United States reach COVID-19 herd immunity if not everyone is vaccinated?




News of two highly effective COVID-19 vaccines is imminent, and health officials and scientists are giving us new insights on how to obtain herd immunity.

“If you think of the population as a single group with all the same risks, susceptibility and behavior, 60% of people need to be immune, which means they don’t get sick, they don’t pass. About the virus to other people, “said Dr. Stuartley, a professor of infectious diseases at John’s Hopkins University and a herd immunity expert.

Dr. Ray said that achieving herd immunity with the help of the COVID-19 vaccine will help enough people to vaccinate or recover from the virus and stop the spread of the virus. Say it means to have.

“It’s a bit like this concept that if you want to convey a message from many people in a group, they have to speak the same language, and the more people who don’t speak, the harder it gets. There is a threshold at which the message will be passed and the message will stop, “says Dr. Ray.

Still, to reach herd immunity, a certain number of people are needed to get the vaccine and sustain that immunity. Dr. Bali Plendran of Stanford University hopes to achieve herd immunity despite a certain number of people hesitating to get vaccinated.

“I think it should be remembered that a vaccine that is 95% effective only works if the majority of the population takes it. Only half of the population or 60% of the population will do it. When taken, we are unlikely to achieve it. The level of herd immunity needed to control the disease, “says Dr. Pulendran.

And if the new COVID-19 vaccine requires two doses, how important is it to ensure that people get the second dose?

Asked if follow-up would be a concern, Dr. Ray said, “I think it could be a concern. We’re going to do a lot of learning. So one of the things we learned. First, I thought about some vaccines. I needed multiple doses, but one dose works pretty well. “

Many people want the end of COVID-19, so doctors say research on vaccines and the virus itself is underway to ensure that people are as protected as possible.


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