Coronavirus

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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

Understanding ‘aerosol transmission’ could be key to controlling coronavirus | The Guardian

Imagine you think there are mice in your house. You can see the evidence – mouse droppings; gnawed or damaged skirting boards; holes left in food packaging. You call a local pest control team who confirm that you have mice and advise you on what is needed to remove them. Neither of you have actually had to see a mouse to reach this conclusion. The same kind of thinking can be applied to the transmission of coronavirus. We don’t need to see the virus to understand how it spreads. Recent studies from China show that patients infected with Covid-19 in… Lire la suite »Understanding ‘aerosol transmission’ could be key to controlling coronavirus | The Guardian

Le collectif « Du Côté de la Science » demande au gouvernement de ne pas abandonner les écoles et de protéger les enfants, les familles et les personnels de l’éducation.

Cet été nous avons alerté sur la progression de l’épidémie que nous jugions inquiétante au regard de ce que nous observions en-dehors de nos frontières, notamment outre-Atlantique. Nos vacances estivales ont provoqué un important brassage de populations qui a eu pour effet de diffuser fortement le virus sur l’ensemble de notre territoire avant de provoquer une explosion du nombre de nouveaux cas. Nous demandions alors de fortes mesures de prévention – recours massif au télétravail et au télé-enseignement, protocole très strict pour l’École – et ne sommes hélas pas surpris d’assister à une 2nde vague qui sera sans doute plus… Lire la suite »Le collectif « Du Côté de la Science » demande au gouvernement de ne pas abandonner les écoles et de protéger les enfants, les familles et les personnels de l’éducation.

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

Long-Haulers Are Redefining COVID-19 – The Atlantic

Lauren Nichols has been sick with COVID-19 since March 10, shortly before Tom Hanks announced his diagnosis and the NBA temporarily canceled its season. She has lived through one month of hand tremors, three of fever, and four of night sweats. When we spoke on day 150, she was on her fifth month of gastrointestinal problems and severe morning nausea. She still has extreme fatigue, bulging veins, excessive bruising, an erratic heartbeat, short-term memory loss, gynecological problems, sensitivity to light and sounds, and brain fog. Even writing an email can be hard, she told me, “because the words I think… Lire la suite »Long-Haulers Are Redefining COVID-19 – The Atlantic