People who are not vaccinated against the coronavirus are 10 times more likely to be hospitalized and 11 times more likely to die from COVID-19 than those who are immunized, according to a study published by the Centers for Disease Control and Prevention (CDC). , for its acronym in English) this Friday.
The three vaccines approved by federal authorities for use in the United States have a combined efficacy of 86%, which nevertheless varies significantly between them: the effectiveness of Moderna's is 95%, compared to 80% of that of Pfizer and 60% of that of Johnson & Johnson.
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The studies released this Friday by the CDC are the largest in real life on the effectiveness of vaccines, involving 32,000 patients seen at medical centers in nine states from June to early August.
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"The bottom line is this: we have the scientific tools we need to turn this pandemic around
,
" CDC Director Rochelle Walensky said at a White House news conference on Friday.
The investigations come a day after President Joe Biden announced his plan to require vaccinations for federal employees and contractors, and businesses with more than 100 workers.
Maria Oramas receives the first dose of the COVID-19 vaccine from Pzifer-BioNTech in Miami, Florida, on Monday, August 9, 2021.AP Photo / Marta Lavandier
The coronavirus has killed more than 650,000 people in the United States since February 2020. In the last week there have only been an average of 1,500 deaths a day, a figure not seen since early March this year, according to data analyzed by the The Washington Post newspaper.
This has been driven by the rise of the dangerous delta variant, which the CDC says accounts for more than 99% of new infections and has cast doubt on the efficacy of vaccines in the medium term.
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The White House is working to make a third booster dose available soon.
So far, Pfizer's vaccine is the only one that has been fully approved by the Food and Drug Administration (FDA), and an additional dose will begin to be administered from the end of September. .
Why is it essential at this time to increase the number of vaccinated against COVID-19 in the country?
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Studies do not make clear why
Moderna is more effective than the others.
However, previous research indicates that it has three times as much messenger RNA and that the four-week wait between the first and second doses may work better.
The CDC also found that hospitalizations among adults age 75 and older increased, which could suggest a "moderate" decline in immunity and the impact of a more contagious variant, according to the scientists.