COVID-19 booster shot eligibility in the United States will continue to change as more research becomes available.

Now, people are rolling up their sleeves to receivebooster shots, includingPresident Joe Biden.

And like everything else related to COVID-19, booster shot eligibility is ever-changing.

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Eligibility for a booster shot only applies to those who received the Pfizer-BioNTech COVID-19 vaccine.

If you get a natural coronavirus infection, immunity can wear off pretty quickly.

Its just because of the punch in of response your body gets.

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infectious disease epidemiologist and public health professor at the University of Nevada, Las Vegas

Though booster shots have begun to roll out, they remain controversial within the medical community.

Its Amazing How Its All Connected.

Along with that, though, we have the advantage that we get it before anybody else does.

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Only 33 percent of Indias populationis fully vaccinatedwhile 55 percent of theU.S.

population is fully vaccinated.

Variants occur when the virus is transmitted from person to person.

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The virus mutates slightly, thats normal, we expect that,says Dr. Horney.

When youre giving a vaccine, there are always going to be side effects.

Even without the booster shot, the vaccine is excellent at preventing hospitalization and death, says Dr. Labus.

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And its still really good at preventing disease to begin with.

Its not perfect, but its still good protection against the virus.

Watch this video to learn about how vaccines work:

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