• Screening and vaccination against #COVID-19 to minimize school closure [11 décembre 2021, preprint sur Delta]
    https://www.medrxiv.org/content/10.1101/2021.08.15.21261243v2.full-text
    #Tests_itératifs

    We found that with 50% adherence, i.e. approximately the value recorded in the French primary schools, weekly screening would reduce the number of cases by 21% (95%CI 19-23%) in the primary and by 26% (25-28%) in the secondary school compared to symptom-based testing [ST] alone. Case reduction would rise to 34% (32-36%) and 36% (35-39%) in the two schools, respectively, with 75% adherence.

    Alternatively, similar reductions would be achieved with 50% adherence and twice-weekly testing. This shows how infection prevention improves with both adherence and frequency of tests, and higher frequency is needed to compensate for lower adherence.

    #Vaccination

    Increasing vaccination coverage in students, both in primary and secondary schools, is a strong protective factor against school outbreaks (Figure 5b,c,d), expected to reduce the epidemic size by 38% with 20% coverage in children and by 75% with 50% coverage, without intervention (i.e. with ST) and with respect to non-vaccination [...].