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Another Booster Shot May Not Be Needed for a Long Time
Another Booster Shot May Not Be Needed for a Long Time
February 21, 2022 at 1:35 pm EST By Taegan Goddard 101 Comments
https://politicalwire.com/2022/02/21/another-booster-shot-may-not-be-needed-for-a-long-time/
"SNIP......
A flurry of new studies finds that people who have received a booster shot of Covid vaccine may not need another “for many months, and perhaps not for years,” the New York Times reports.
“Three doses of a Covid vaccine — or even just two — are enough to protect most people from serious illness and death for a long time, the studies suggest.”
“Although people over 65 or at high risk of illness may benefit from a fourth vaccine dose, it may be unnecessary for most people.”
.......SNIP"
18 replies
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= new reply since forum marked as read
The agency also finds that third shots prevented hospitalizations during the Omicron wave.
https://www.the-scientist.com/news-opinion/cdc-covid-19-booster-effectiveness-wanes-after-four-months-69703
Booster shots of the Pfizer-BioNTech and Moderna COVID-19 mRNA vaccines protected against hospitalization during this winter’s Omicron surge, but lose a substantial amount of effectiveness after about four months, according to a new study published Friday (February 11) by the Centers for Disease Control and Prevention.
Researchers found that mRNA vaccines remained highly effective against both moderate and severe cases of COVID-19 for about two months after a third dose, but the boosters’ effectiveness dropped substantially by four months. The study suggests that those at high risk of severe disease from SARS-CoV-2 infection may need additional booster shots.
See “To Booster or Not: Scientists and Regulators Debate”
In the study, researchers measured how effective COVID-19 mRNA vaccines—either Pfizer-BioNTech or Moderna—were at preventing both hospitalization and visits to emergency departments or urgent care facilities. Using data from 10 US states gathered between August 26, 2021 and January 22, 2022, the researchers analyzed 241,204 visits to emergency departments and urgent care facilities as well as 93,408 hospitalizations among adults older than 18 who had received two or three doses of the vaccine. They found that booster shots were 91 percent effective at preventing hospitalization against any variant for two months. After four months, however, this number declined to 78 percent.
In the same time frame after the booster, protection against emergency department and urgent care visits dropped from 87 percent to 66 percent. This number dropped further, to just 31 percent, after five months. But, according to The New York Times, most people received their booster shot within four months of the study’s timeframe, so the data are limited. Without a booster shot, protection against hospitalization within two months of a second mRNA shot was 71 percent, falling to 54 percent after five months.
snip
https://www.the-scientist.com/news-opinion/cdc-covid-19-booster-effectiveness-wanes-after-four-months-69703
Booster shots of the Pfizer-BioNTech and Moderna COVID-19 mRNA vaccines protected against hospitalization during this winter’s Omicron surge, but lose a substantial amount of effectiveness after about four months, according to a new study published Friday (February 11) by the Centers for Disease Control and Prevention.
Researchers found that mRNA vaccines remained highly effective against both moderate and severe cases of COVID-19 for about two months after a third dose, but the boosters’ effectiveness dropped substantially by four months. The study suggests that those at high risk of severe disease from SARS-CoV-2 infection may need additional booster shots.
See “To Booster or Not: Scientists and Regulators Debate”
In the study, researchers measured how effective COVID-19 mRNA vaccines—either Pfizer-BioNTech or Moderna—were at preventing both hospitalization and visits to emergency departments or urgent care facilities. Using data from 10 US states gathered between August 26, 2021 and January 22, 2022, the researchers analyzed 241,204 visits to emergency departments and urgent care facilities as well as 93,408 hospitalizations among adults older than 18 who had received two or three doses of the vaccine. They found that booster shots were 91 percent effective at preventing hospitalization against any variant for two months. After four months, however, this number declined to 78 percent.
In the same time frame after the booster, protection against emergency department and urgent care visits dropped from 87 percent to 66 percent. This number dropped further, to just 31 percent, after five months. But, according to The New York Times, most people received their booster shot within four months of the study’s timeframe, so the data are limited. Without a booster shot, protection against hospitalization within two months of a second mRNA shot was 71 percent, falling to 54 percent after five months.
snip
