3 ms·

I am not sure how do you draw these conclusions from the study. There's no comparison between transmission by vaccinated and non-vaccinated children, so there'

I am not sure how do you draw these conclusions from the study. There's no comparison between transmission by vaccinated and non-vaccinated children, so there's no possible way of concluding that vaccination reduced transmission relative to non-vaccination.

graeme 6y ago
Among the vaccinated students 30% showed antibodies but were pcr negative. Hence they had fought off an infection but had no trace of replication. You would not expect to see seropositive but pcr negative students if unvaccinated.