What do you mean by "infected"? One can be infected, and not be sick:
"One of the most perplexing and enduring mysteries of the pandemic is also one of the most fundamental questions about viruses. How can the same virus that kills so many go entirely unnoticed in others?
The mystery is hardly unique to COVID-19. SARS, MERS, influenza, Ebola, dengue, yellow fever, chikungunya, West Nile, Lassa, Japanese encephalitis, Epstein-Barr, and polio can all be deadly in one person but asymptomatic in the next.
But for most of human existence, we didn’t know that viruses could infect us asymptomatically. We didn’t know how to look for them, or even that we should. The tools of modern science have slowly made the invisible visible: Antibody surveys that detect past infection, tests that find viral DNA or RNA even in asymptomatic people, and mathematical models all show that viruses are up to much more than making us sick. Scientists now think that for viruses, a wide range of disease severity is the norm rather than the exception."
https://www.theatlantic.com/science/...s-sick/618530/)
"In another dispiriting setback for the nation’s efforts to stamp out the coronavirus, scientists who studied a big COVID-19 outbreak in Massachusetts concluded that vaccinated people who got so-called breakthrough infections carried about the same amount of the coronavirus as those who did not get the shots.
Health officials on Friday released details of that research, which was key in this week’s decision by the Centers for Disease Control and Prevention to recommend that vaccinated people return to wearing masks indoors in parts of the U.S. where the delta variant is fueling infection surges. The authors said the findings suggest that the CDC’s mask guidance should be expanded to include the entire country, even outside of hot spots.
The findings have the potential to upend past thinking about how the disease is spread. Previously, vaccinated people who got infected were thought to have low levels of virus and to be unlikely to pass it to others. But the new data shows that is not the case with the delta variant.
The outbreak in Provincetown — a seaside tourist spot on Cape Cod in the county with Massachusetts’ highest vaccination rate — has so far included more than 900 cases. About three-quarters of them were people who were fully vaccinated.
Travis Dagenais, who was among the many vaccinated people infected, said “throwing caution to the wind” and partying in crowds for long nights over the July Fourth holiday was a mistake in hindsight.
“The dominant public messaging has been that the vaccine means a return to normal,” the 35-year-old Boston resident said Thursday. “Unfortunately, I’ve now learned it’s a few steps toward normal, not the zero-to-sixty that we seem to have undertaken.”
https://apnews.com/article/science-h...5ca012b5ef84d1
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