Ehkä sitten "aivopesty" tiedemiesten toimesta.
COVID-19 vaccines that have obtained WHO emergency use listing appear to have high efficacy against severe disease and death, but lower efficacy against non-severe infections, and emerging evidence suggests that protection against non-severe disease declines faster following vaccination than...
www.thelancet.com
"Higher SARS-CoV-2 viral density in the upper airways of people infected with the virus are thought to increase transmission to household members.5, 6 If vaccines reduce viral density in those who do become infected despite vaccination, it would probably lead to lower infectiousness and less onward transmission. Hence, the authors compared the viral kinetics in breakthrough delta variant infections in vaccinated people with delta variant infections in unvaccinated people. They report that peak viral loads showed a faster decline in vaccinated compared with unvaccinated people, although peak viral loads were similar for unvaccinated and vaccinated people."
"Our analyses suggest that before emergence of the Delta variant, breakthrough cases among vaccinated individuals had slightly reduced infectiousness compared with unvaccinated cases. However, both waning of vaccine-induced immunity and the emergence of the Delta variant were associated with a reduction in the VEI. These results are in agreement with recent findings in a UK study, where the SAR was similar for vaccinated and unvaccinated index cases infected with the Delta variant (12). However, vaccination still reduces the risk of transmission by providing protection against susceptibility to infection, even if this effect is reduced over time because of both waning immunity and the Delta variant, as highlighted in real-world settings (12, 19, 20)."