Pfizer announced Saturday that tweaking its COVID-19 vaccine to better target the omicron variant is safe and works—just days before regulators debate whether to offer Americans updated booster shots this fall.
Jun 25, 2022
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Vaccines based on inactivated SARS-CoV-2 virus are commonly used in developing countries due to their low cost. New research from Karolinska Institutet in Sweden shows that a booster shot of mRNA vaccine to individuals who ...
May 13, 2022
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A collaboration between researchers at Duke University and Harvard Medical School has shown that mice receiving a booster shot in the same limb resulted in stronger adaptive immunity than a shot in another limb. In their ...
COVID-19 vaccinations are at a critical juncture as companies test whether new approaches like combination shots or nasal drops can keep up with a mutating coronavirus—even though it's not clear if changes are needed.
Apr 24, 2022
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People who are vaccinated and have had a booster shot against COVID-19 recover from symptoms from the Omicron variant more than three days earlier than those with the Delta variant, a study said Friday.
Apr 7, 2022
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A team of researchers working at Israel's Sheba Medical Center has found evidence that suggests a fourth COVID vaccination or second booster shot may not be necessary for most people because it does not add significant protection. ...
In adults who had previously received a full regimen of any of three COVID-19 vaccines granted Emergency Use Authorization (EUA) or approved by the Food and Drug Administration (FDA), an additional booster dose of any of ...
Jan 26, 2022
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A coronavirus booster shot provides a better immune response against COVID-19 than a single vaccine dose. mRNA boosters are the most effective upon receiving Janssen. These are the results of a collaborative study between ...
Jan 24, 2022
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Millions of people around the world have received two shots of Sinovac, a Chinese-manufactured inactive vaccine that is used in 48 countries to help reduce transmission rates of COVID-19.
Jan 20, 2022
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Vaccines are less effective against some COVID-19 variants and boosting may be required within one year to maintain efficacy above 50 percent, according to a new study.
Nov 18, 2021
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