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US FDA clears Pfizer and Moderna COVID-19 boosters for all adults

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US Food and Drug Administration has approved Pfizer / BioNTech and Moderna COVID-19 booster shots for all adults, the companies announced, expanding eligibility outside of the initial, vulnerable groups they were cleared for earlier this fall.

Although the COVID-19 vaccines available in the United States are still highly effective protection against severe cases of the disease, hospitalization, and death, protection against any infection or symptoms appears to be weakening. A third, booster shot of the vaccines could make it more effective against the COVID-19.

In a clinical trial, Pfizer showed that the shot was around 95 percent effective compared with people who only had two doses, essentially restoring the same efficacy seen in the initial clinical trials.

Analysis out of Israel and the United Kingdom, which have been using booster doses for longer than the US, also show that a third shot significantly blunts infection rates. The booster is available to anyone over 40 in the United Kingdom and anyone over 12 in Israel.

Until now, booster shots of the Pfizer / BioNTech and Moderna COVID-19 vaccines were officially available to people 65 years of age and older, those who are at high risk of severe disease, healthcare workers, and other people at high risk of exposure to COVID-19 at work.

But in response to recent hike in infection rates, some states have moved ahead and started offering third doses to everyone.

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