U.S. study suggests Covid-19 vaccines may be ineffective against Omicron without booster


  • World
  • Wednesday, 15 Dec 2021

NEW YORK: All three U.S.-authorized Covid-19 vaccines appear to be significantly less protective against the newly-detected Omicron variant of the virus in laboratory testing, but a booster dose likely restores most of the protection, according to a study released on Tuesday (Dec 14).

The study from researchers at Massachusetts General Hospital (MGH), Harvard and MIT that has not yet been peer-reviewed tested blood from people who received the Moderna, Johnson & Johnson and Pfizer/BioNTech vaccines against a pseudovirus engineered to resemble the Omicron variant.

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