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Vaccinated People Can Carry as Much Virus as the Unvaccinated: New CDC Study

The report's authors suggest the CDC's new guidelines should include masking in indoor public settings.

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US health officials on Friday, 30 July, released details of an alarming new study that could upend the current beliefs on how the coronavirus spreads.

The latest research from the Centers for Disease Control and Prevention (CDC) shows that vaccinated people who got infected with COVID-19, or the so-called breakthrough infections, carry about the same amount of the coronavirus load as those who are unvaccinated.

The study, published in CDC's flagship weekly report, is the basis for recent recommendations that vaccinated people wear masks indoors in places with high transmission rates – driven now by the Delta variant.
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The report's authors suggest the CDC's new guidelines should include masking in indoor public settings "regardless of vaccination status".

The study derived its insights from an outbreak in Provincetown, a popular tourist hotspot in Cape Cod, Massachusetts.

After multiple large public events, 469 COVID-19 cases were identified among Massachusetts residents who had travelled to the town during July.

Three-fourths (74 percent) of the cases were among fully vaccinated people.

"Testing identified the Delta variant in 90 percent of specimens from 133 patients," the report adds.

"The cycle threshold values were similar among specimens from patients who were fully vaccinated and those who were not," it read.

The upshot: "Among persons with breakthrough infection, four (1.2 percent) were hospitalised, and no deaths were reported."

The release of this CDC report coincides with a Washington Post scoop of internal CDC documents that painted a grim picture of how the "war has changed" on COVID-19, after the delta variant seeped into America.

Speaking to reporters at the White House, US President Joe Biden indicated that new COVID-19 guidelines could come soon.

(At The Quint, we are answerable only to our audience. Play an active role in shaping our journalism by becoming a member. Because the truth is worth it.)

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