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Aerosol transmission of Covid-19: A room, a bar and a classroom: how the coronavirus is spread through the air | Society | EL PAÍS in English

The risk of contagion is highest in indoor spaces but can be reduced by applying all available measures to combat infection via aerosols. Here is an overview of the likelihood of infection in three everyday scenarios, based on the safety measures used and the length of exposure Scrolling 1 Six people get together in a private home, one of whom is infected. Some 31% of coronavirus outbreaks recorded in Spain are caused by this kind of gathering, mainly between family and friends. Irrespective of whether safe distances are maintained, if the six people spend four hours together talking loudly, without… Lire la suite »Aerosol transmission of Covid-19: A room, a bar and a classroom: how the coronavirus is spread through the air | Society | EL PAÍS in English

Reconfinement : l’ouverture des écoles « interroge » pour Hélène Rossinot, médecin spécialiste en santé publique – France Bleu

Dossier : Coronavirus Covid-19 Reconfinement : l’ouverture des écoles « interroge » pour Hélène Rossinot, médecin spécialiste en santé publique /lieu Un cahier rouge posé sur une table dans une salle de classe d’une école de Vesoul (Haute-Saône), 14 mai 2020. © Radio France – Jean-François Fernandez La nancéienne Hélène Rossinot, médecin spécialiste en santé publique était l’invitée de France Bleu Lorraine ce jeudi 29 octobre. La membre du collectif « Du côté de la science » s’interroge sur la pertinence du maintien des écoles, collèges et lycées. /hat Hélène Rossinot, médecin spécialiste en santé publique et membre du collectif « du côté de la… Lire la suite »Reconfinement : l’ouverture des écoles « interroge » pour Hélène Rossinot, médecin spécialiste en santé publique – France Bleu

Robust neutralizing antibodies to SARS-CoV-2 infection persist for months | Science

Abstract SARS-CoV-2 has caused a global pandemic with millions infected and numerous fatalities. Questions regarding the robustness, functionality, and longevity of the antibody response to the virus remain unanswered. Here we report that the vast majority of infected individuals with mild-to-moderate COVID-19 experience robust IgG antibody responses against the viral spike protein, based on a dataset of 30,082 individuals screened at Mount Sinai Health System in New York City. We also show that titers are relatively stable for at least a period approximating 5 months and that anti-spike binding titers significantly correlate with neutralization of authentic SARS-CoV-2. Our data suggests… Lire la suite »Robust neutralizing antibodies to SARS-CoV-2 infection persist for months | Science

It Is Time to Address Airborne Transmission of Coronavirus Disease 2019 (COVID-19) | Clinical Infectious Diseases | Oxford Academic

We appeal to the medical community and to the relevant national and international bodies to recognize the potential for airborne spread of coronavirus disease 2019 (COVID-19). There is significant potential for inhalation exposure to viruses in microscopic respiratory droplets (microdroplets) at short to medium distances (up to several meters, or room scale), and we are advocating for the use of preventive measures to mitigate this route of airborne transmission. Studies by the signatories and other scientists have demonstrated beyond any reasonable doubt that viruses are released during exhalation, talking, and coughing in microdroplets small enough to remain aloft in air… Lire la suite »It Is Time to Address Airborne Transmission of Coronavirus Disease 2019 (COVID-19) | Clinical Infectious Diseases | Oxford Academic

Transmission du Covid-19 : les enfants et l’école, un cocktail explosif ? – Le Parisien

Elles devraient passer entre les mailles du confinement. Selon toute vraisemblance, les écoles vont rester ouvertes en France, malgré l’annonce d’un confinement. En attendant l’arbitrage définitif, le débat scientifique fait rage : les enfants, parfois décrits comme des petits « contaminateurs », seraient à l’origine d’une reprise de l’épidémie en Israël, selon une récente étude du gouvernement. En cause, leur retour sur les bancs de l’école. Une donnée fait bien consensus depuis le début de la crise sanitaire : les enfants souffrent pour la plupart de formes bénignes du virus. « Chez les enfants, l’infection est généralement plus légère ou… Lire la suite »Transmission du Covid-19 : les enfants et l’école, un cocktail explosif ? – Le Parisien

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

SARS-CoV-2 vaccines in development | Nature

Abstract Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) was first reported in late 2019 in China and is the causative agent of the coronavirus disease 2019 (COVID-19) pandemic. To mitigate the effects of the virus on public health, the economy and society, a vaccine is urgently needed. Here I review the development of vaccines against SARS-CoV-2. Development was initiated when the genetic sequence of the virus became available in early January 2020, and has moved at an unprecedented speed: a phase I trial started in March 2020 and there are currently more than 180 vaccines at various stages of development.… Lire la suite »SARS-CoV-2 vaccines in development | Nature

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

Covid-19 : la ventilation des lieux clos, un geste barrière contre le Covid-19 jusqu’ici négligé – Le Monde

La recommandation est tombée comme une évidence lors de l’entretien avec Emmanuel Macron, le 14 octobre, annonçant le couvre-feu en Ile-de-France et dans huit métropoles : « Aérer régulièrement (…), dix minutes trois fois par jour. » C’est, selon le président de la République, la quatrième règle barrière que tout le monde devrait suivre. L’évidence est en fait assez récente. Le Haut Conseil de la santé publique (HCSP) l’évoque dans bon nombre de ses avis, et des médecins le proclament depuis longtemps, mais la consigne restait loin derrière le lavage des mains, les masques ou les distances de sécurité. Le conseil scientifique… Lire la suite »Covid-19 : la ventilation des lieux clos, un geste barrière contre le Covid-19 jusqu’ici négligé – Le Monde