06 Aug WisBusiness: Vaccinated had similar nasal viral particles as unvaccinated
A recent study of around 300 COVID-19 patients in Wisconsin found that vaccinated people had similar levels of viral particles in their nasal passages as those who were unvaccinated.
The study from UW-Madison, Exact Sciences and Public Health Madison and Dane County suggests that those who are vaccinated and become infected with the virus could potentially pass it on to others. It was published Saturday in medRxiv, an online archive for scholarly papers that have yet to be peer reviewed.
After analyzing samples collected between June 28 and July 24, researchers found “no significant difference” in the quantity of virus particles present between the vaccinated and unvaccinated groups. In total, 79 study participants were fully vaccinated and 212 others were not vaccinated.
Both groups presented high enough “viral loads” at the time of their test to be contagious, according to a release from UW-Madison. Still, researchers stress that getting vaccinated against the virus is effective at preventing serious symptoms, and breakthrough cases in vaccinated people are expected but rare.
“They’re still working to keep people from becoming infected, though not necessarily as well as they were against earlier types of the virus,” said David O’Connor, co-author of the study and a professor with the UW School of Medicine and Public Health. “As long as the vaccines are keeping people out of the hospitals, I would say they’re working spectacularly well.”
Only half of the study samples underwent genetic testing at the time the report was published, but 84 percent of those tested were identified as the delta variant.
See the study here: https://www.medrxiv.org/content/10.1101/2021.07.31.21261387v1