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Cohort study reveals adults spread SARS-CoV-2 more efficiently than children, suggesting vaccination reduces infection risk.
In this study, adults spread SARS-CoV-2 in households more efficiently than children. While the index case vaccination status showed no difference, unvaccinated household members were more prone to SARS-CoV-2 infection than vaccinated individuals.Key pointsA cohort of households with children was prospectively studied for SARS-CoV-2 transmission through repeated PCR, and serology was obtained 5 weeks post-infection. Adults transmitted the virus more effectively than children, and unvaccinated participants were more susceptible than vaccinated participants.
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Ahti et al. (2026) studied this question.
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