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04-08-2021, 11:21 PM
https://www.reuters.com/business/healthc...021-08-02/
Delta breakthrough infections likely contagious
Among people infected by the Delta variant of the coronavirus, fully vaccinated people with "breakthrough" infections may be just as likely as unvaccinated people to spread the virus to others, new research suggests. The higher the amount of coronavirus in the nose and throat, the more likely the patient will infect others. In one Wisconsin county, after Delta became predominant, researchers analyzed viral loads on nose-and-throat swab samples obtained when patients were first diagnosed. They found similar viral loads in vaccinated and unvaccinated patients, with levels often high enough to allow shedding of infectious virus. "A key assumption" underlying current regulations aimed at slowing COVID-19 transmission "is that those who are vaccinated are at very low risk of spreading the virus to others," said study coauthor Katarina Grande of Public Health Madison & Dane County in Madison, Wisconsin. The findings, however, indicate "that vaccinated people should take steps to prevent the spread of the COVID-19 virus to others," she added. In a separate study from Singapore, researchers found that while Delta viral loads were similar in vaccinated and unvaccinated patients, the viral loads decreased faster in the vaccinated group.
Delta breakthrough infections likely contagious
Among people infected by the Delta variant of the coronavirus, fully vaccinated people with "breakthrough" infections may be just as likely as unvaccinated people to spread the virus to others, new research suggests. The higher the amount of coronavirus in the nose and throat, the more likely the patient will infect others. In one Wisconsin county, after Delta became predominant, researchers analyzed viral loads on nose-and-throat swab samples obtained when patients were first diagnosed. They found similar viral loads in vaccinated and unvaccinated patients, with levels often high enough to allow shedding of infectious virus. "A key assumption" underlying current regulations aimed at slowing COVID-19 transmission "is that those who are vaccinated are at very low risk of spreading the virus to others," said study coauthor Katarina Grande of Public Health Madison & Dane County in Madison, Wisconsin. The findings, however, indicate "that vaccinated people should take steps to prevent the spread of the COVID-19 virus to others," she added. In a separate study from Singapore, researchers found that while Delta viral loads were similar in vaccinated and unvaccinated patients, the viral loads decreased faster in the vaccinated group.
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