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  3. Jul 20, 2022 · What You Need to Know. COVID-19 Vaccine booster shots are available for the following Pfizer-BioNTech vaccine recipients who completed their initial series at least 6 months ago and are: 65 years and older. Age 18+ who live in long-term care settings. Age 18+ who have underlying medical conditions.

  4. Feb 24, 2022 · Research collected during the omicron wave and published by the Centers for Disease Control and Prevention (CDC) found that about two months after a Pfizer-BioNTech or Moderna booster shot, the vaccine’s effectiveness against hospitalization was around 90 percent.

  5. Apr 01, 2022 · Protection against mild COVID increases to about 65% to 70% following a booster dose but drops to 45% to 50% after about two months, according to a report from the UK released in January. Protection against severe COVID lasts much longer. After a booster, protection against hospitalization stands at 92% and remains high at 83% two months later.

  6. Nov 23, 2021 · When are the booster shots most effective? Dr. Simone Wildes, an infectious disease specialist at South Shore Health in Massachusetts, said that the highest antibody count will come 10 to 14 days after you get the shot, according to ABC News. “The booster shot will have a similar response as the second dose of the primary series.

  7. Nov 22, 2021 · COVID-19 booster shots are now authorized for anyone over the age of 18. But experts say it's important to understand that protection doesn't kick in right away. Although the body starts to increase antibodies within a few days after the shot, it takes two weeks for peak protection to return.

  8. Apr 19, 2022 · He said it appeared the group that got the second booster had some protection against infection, maybe 50 to 100 percent likely, but the vaccine and initial booster already are already pretty...

  9. Jul 21, 2022 · Covid-19 cases are rising again, driven by Omicron subvariant BA.5. Federal health officials urge Americans to get vaccine boosters if they are due, but if new boosters are developed for the fall ...

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