[quote peboh]@MareofBeasttown
It isn't true that vaccinated people are still carrying covid? [/quote]
Vaccination cuts transmission rates because vaccinated people clear the virus much faster.
COVID vaccines protect against Delta but don't fully stop disease spread
Higher infection rates among unvaccinated
The secondary attack rate, or the percentage of contacts infected by the index patient, was 25% (95% confidence interval [CI], 18% to 33%) in fully vaccinated participants, compared with 38% (95% CI, 24% to 53%) in the unvaccinated.
Among household contacts of fully vaccinated COVID-19 patients, the secondary attack rate was comparable to that of household contacts of unvaccinated index patients (25% [95% CI, 15% to 35%] for vaccinated vs 23% [95% CI, 15% to 31%] for unvaccinated patients).
Of 31 infections, 12 (39%) in fully vaccinated COVID-19 household contacts arose from epidemiologically connected fully vaccinated index patients; genomic and virologic analysis in three pairs of index cases and contacts found a similar percentage.
While vaccinated participants cleared the coronavirus faster than their unvaccinated counterparts, both had similar peak viral loads, which the researchers said could explain its ease in spreading among household members, regardless of vaccination status. Nor did peak viral load differ by variant type, but it increased some with age (difference in peak log10 viral load per milliliter [mL] between those aged 10 and 50 years, 0.39 [95% credible interval, -0.03 to 0.79]).
Average viral load also declined faster in fully vaccinated participants infected with the Delta variant than among unvaccinated participants infected with pre-Alpha (B117), Alpha, or Delta variants.