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Lähteinä useampi eri tutkimuksia, jotka ilmeisesti ajalta ennen omicronin leviämistä, joten ei voine omicronin piikkiin laittaa.
"This study showed that the impact of vaccination on community transmission of circulating variants of SARS-CoV-2 appeared to be not significantly different from the impact among unvaccinated people. "
Vaccine effectiveness studies have conclusively demonstrated the benefit of COVID-19 vaccines in reducing individual symptomatic and severe disease, resulting in reduced hospitalisations and intensive care unit admissions.1 However, the impact of vaccination on transmissibility of SARS-CoV-2...
www.thelancet.com