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People who became infected with Covid-19 after getting a messenger RNA vaccine carried less virus and had shorter cases than unvaccinated people who became infected, a study by government health researchers found.
Sixteen people in the study who got infected, despite taking a Pfizer Inc.
PFE,
or Moderna Inc.
MRNA,
vaccine, had on average 40% less virus in their nose compared with the 155 unvaccinated people who became sick, according to the study, published online Wednesday in the New England Journal of Medicine.
