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transmission

On the effect of age on the transmission of SARS-CoV-2 in households, schools and the community | The Journal of Infectious Diseases | Oxford Academic

Methods We reviewed published studies/data on detection of SARS-CoV-2 infection in contacts of COVID-19 cases, serological studies, and studies of infections in schools. Results Compared to younger/middle aged adults, susceptibility to infection for children aged under 10y is estimated to be significantly lower, while estimated susceptibility to infection in adults aged over 60y is higher. Serological studies suggest that younger adults (particularly those aged under 35y) often have high cumulative incidence of SARS-CoV-2 infection in the community. There is some evidence that given limited control measures, SARS-CoV-2 may spread robustly in secondary/high schools, and to a lesser degree in primary… Lire la suite »On the effect of age on the transmission of SARS-CoV-2 in households, schools and the community | The Journal of Infectious Diseases | Oxford Academic

Un salon, un bar et une classe: ainsi se transmet le coronavirus dans l’air | Ciencia | EL PAÍS

    Les intérieurs sont plus dangereux, mais les risques peuvent être réduits en mettant en place toutes les mesures disponibles pour lutter contre la contagion des aérosols. Voici les probabilités d’infection dans ces trois scénarios quotidiens en fonction de la ventilation, des masques et de la durée de la rencontre Six personnes, dont une est contaminée, se réunissent dans une maison. 31% des foyers connus en Espagne apparaissent dans ce genre de réunions sociales, notamment dans les rencontres avec des membres de la famille et des amis. Indépendamment de la distance, si les cinq autres personnes passaient quatre heures… Lire la suite »Un salon, un bar et une classe: ainsi se transmet le coronavirus dans l’air | Ciencia | EL PAÍS

Virology, transmission, and pathogenesis of SARS-CoV-2 | The BMJ

  What you need to know SARS-CoV-2 is genetically similar to SARS-CoV-1, but characteristics of SARS-CoV-2—eg, structural differences in its surface proteins and viral load kinetics—may help explain its enhanced rate of transmission In the respiratory tract, peak SARS-CoV-2 load is observed at the time of symptom onset or in the first week of illness, with subsequent decline thereafter indicating the highest infectiousness potential just before or within the first five days of symptom onset Reverse transcription polymerase chain reaction (RT-PCR) tests can detect viral SARS-CoV-2 RNA in the upper respiratory tract for a mean of 17 days; however, detection… Lire la suite »Virology, transmission, and pathogenesis of SARS-CoV-2 | The BMJ