A study published in the New England Journal of Medicine showed that people vaccinated against COVID-19 remained contagious with the virus for a longer period of time than their unvaccinated counterparts. The disparity in contagiousness was particularly pronounced between individuals who did not receive a booster shot and those who did.
Researchers studied 66 participants who contracted COVID-19, including 32 people with the Delta variant and 34 with the Omicron variant.
- The findings were published in a letter to the editor signed by dozens of doctors from a variety of hospitals in Boston, Massachusetts in the prestigious New England Journal of Medicine in June.
Researchers compiled a variety of graphs tracking how long people remained contagious with the virus, using both PCR tests and viral cultures as indicators.
- Within the first 10 days of contracting the virus 68.75% of unvaccinated subjects were no longer contagious, while just 29.72% of vaccinated and 38.46% of boosted subjects were not.
- Fifteen days into the study, 93.75%, 92.31%, and 78.38 percent of vaccinated people weren't contagious.
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