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How can scientists update coronavirus vaccines for omicron?

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WASHINGTON : A microbiologist answers 5 questions about how Moderna and Pfizer could rapidly adjust mRNA vaccines. 1.

Why might vaccines need to be updated?  Basically, it’s a question of whether a virus has changed enough so that antibodies created by the original vaccine are no longer able to recognize and fend off the new mutated variant.

Coronaviruses use spike proteins to attach to ACE-2 receptors on the surface of human cells and infect them. All mRNA COVID-19 vaccines work by giving instructions in the form of mRNA that direct cells to make a harmless version of the spike protein.

This spike protein then induces the human body to produce antibodies. If a person is then ever exposed to the coronavirus, these antibodies bind to the

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COVID-19
United States
United States
Cases: 46 252 513
Deaths: 750 423
Recovered: 0
India
India
Cases: 34 321 025
Deaths: 459 652
Recovered: 0
Brazil
Brazil
Cases: 21 835 785
Deaths: 608 235
Recovered: 0
United Kingdom
United Kingdom
Cases: 9 215 683
Deaths: 141 607
Recovered: 0
Russia
Russia
Cases: 8 494 589
Deaths: 237 619
Recovered: 0
Detail statistic
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