19:39, 13/07/2021
Information about the characteristics of these variants is rapidly emerging. Scientists are working to learn more about how easily they spread, whether they could cause more severe illness, và whether currently authorized vaccines will protect people against them.

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What We know

Viruses constantly change through mutation, & new variants of a virus are expected khổng lồ occur. Sometimes new variants emerge và disappear. Other times, new variants persist. Multiple variants of the vi khuẩn that causes COVID-19 have sầu been documented in the United States & globally during this pandemic.


Viruses constantly change and become more diverse. Scientists monitor these changes, including changes lớn the spikes on the surface of the vi khuẩn. By carefully studying viruses, scientists can learn how changes to lớn the virus might affect how it spreads và how sichồng people will get from it.

If you think about a virut lượt thích a tree growing và branching out; each branch on the tree is slightly different than the others. By comparing the branches, scientists can label them according to the differences. These small differences, or variants, have sầu been studied & identified since the beginning of the pandemic.

Some variations allow the virut to lớn spread more easily or make it resistant to treatments or vaccines. Those variants must be monitored more carefully.

Learn more about how scientists monitor viruses.

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Variants in the United States

We are monitoring multiple variants; currently there are four notable variants in the United States:

B.1.1.7 (Alpha): This variant was first detected in the United States in December 20đôi mươi. It was initially detected in the United Kingdom.

B.1.351 (Beta): This variant was first detected in the United States at the kết thúc of January 2021. It was initially detected in South Africa in December 2020.

P..1 (Gamma):This variant was first detected in the United States in January 2021. P.1 was initially identified in travelers from Brazil, who were tested during routine screening at an airport in Japan, in early January.

B.1.617.2 (Delta): This variant was first detected in the United States in March 2021. It was initially identified in India in December 20đôi mươi.

These variants seem to spread more easily & quickly than other variants, which may lead to lớn more cases of COVID-19. An increase in the number of cases will put more strain on healthcare resources, lead to more hospitalizations, và potentially more deaths.

So far, studies suggest that the current authorized vaccines work on the circulating variants. Scientists will continue khổng lồ study these và other variants.