August 10, 2022
At five days post-infection, less than 25 percent of unvaccinated people were still contagious, whereas around 70 percent of boosted people were still carrying viable virus particles. For those partially vaccinated, around 50 percent were still contagious at this point.
Even more strikingly, at ten days post-infection, one-third of boosted people (31 percent) were found to still be carrying live, culturable virus. By contrast, just six percent of unvaccinated people were still contagious at day 10.
In other words, people who have received a booster shot are five times more likely still to be contagious at ten days post-infection than are unvaccinated people.
The findings go a long way to explaining why Paxlovid, Pfizer’s anti-viral medication, is often not effective for people who have been vaccinated against COVID, with many experiencing a recurrence of symptoms along with a positive COVID test after completing the five-day regimen (as recently occurred with quadruple-vaccinated Dr. Anthony Fauci). This phenomenon is known as COVID rebound.
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