What is herd immunity and could it work with COVID-19? Herd immunity is when a virus can no longer spread easily because enough people are immune to it. That lowers the chances of the virus jumping from person to person and reaching those who haven’t been infected yet.People can become immune to certain viruses after…

What is herd immunity and could it work with COVID-19?

What is herd immunity and could it work with COVID-19?

Herd immunity is when a virus can no longer spread easily because enough people are immune to it. That lowers the chances of the virus jumping from person to person and reaching those who haven’t been infected yet.

People can become immune to certain viruses after surviving infection or being vaccinated. Typically, at least 70% of a population must be immune to achieve herd immunity. But how long immunity lasts varies depending on the virus, and it’s not yet known how long COVID-19 survivors might have that protection.

How easily the virus spreads also plays a key role.

Say, for example, someone who’s infected with a particular virus typically transmits it to two others. The chances of that person passing it on to others would be lower if half the population is already immune, said Dr. Walter Orenstein, a vaccine expert at Emory University.

The odds of transmission fall further if even more of the population is immune. That could cause new infections to die out.

But if a virus is more infectious, a higher percentage of people would need to have immunity to stop the spread and achieve herd immunity, Orenstein said.

Full Coverage: Viral Questions

___

The AP is answering your questions about the coronavirus in this series. Submit them at: FactCheck@AP.org.

Read previous Viral Questions:

Will employee temperature checks make workplaces safe?

How should I clean and store my face mask?

Read More

About No Specific Author

Check Also

Coronavirus: Latest on COVID-19 from around the world

Coronavirus: Latest on COVID-19 from around the world

Almost 18 million people have been reported to be infected by the novel coronavirus globally, and 685,000 have now died. Nearly 300,000 people were reported infected in the past 24 hours and 6400 dead. Here are the latest developments from around the world. Europe Ireland Ireland's chief medical officer on Saturday described a recent spike…

Leave a Reply

Your email address will not be published. Required fields are marked *

This site uses Akismet to reduce spam. Learn how your comment data is processed.

Кроме того, игра в new retro казино максимально удобна для пользователей. فوم یا ژل پاک کننده برای پوست چرب بهتر است؟ هفته سلامتی.