Technology Covid-19: Are vaccines preventing us from being contagious?

Covid-19: Are vaccines preventing us from being contagious?




A nurse vaccinates a man who is part of the nursing staff at Hôtel-Dieu hospital in Paris, January 2, 2021. (SAMEER AL-DOUMY / AFP)

Getting vaccinated is an altruistic gesture, said the Prime Minister. It is above all, today, a way to avoid having a severe form of Covid-19. But do vaccinated people no longer catch the virus and infect others? This would be the best news of the year because it would pave the way for the acquisition of collective immunity through this vaccination. This weekend, when she was vaccinated, Professor Claire Poyart, representative of the doctors of the Hôtel-Dieu, recalled that she was doing it to set an example for her colleagues and for her patients. But it is above all because caregivers must not get sick, otherwise who will care for those infected and those with other diseases? Moreover, since the start of the epidemic, more than 54,000 medical personnel have contracted the virus, in particular nursing assistants, physiotherapists and nurses.

The vaccine is not synonymous with the abandonment of barrier gestures. Once vaccinated, caregivers must always wear the mask because, for the moment, we know that these vaccines prevent serious forms of Covid at 95% for those of Pfizer-BioNTech and Moderna, at 70% for AstraZeneca, but we don’t really know if they prevent catching the virus anyway. Clinical trials first looked at whether vaccinated patients fell more or less sick than patients in the control group. But they had not yet compared whether the vaccinated patients were okay, but still carried the virus. How many of them remained asymptomatic? And is this also less than in the control group?

According to documents from the FDA, the US drug agency and published in the journal New England Journal of Medicine, the vaccine also limits contagiousness. In any case, with regard to Moderna’s, the number of asymptomatic patients is lower in the vaccinated group than in the control group, especially after the two injections. This is only for a small number of people, so it still requires new posts but it is very encouraging.

The big tile of this epidemic is that it develops without our knowledge with a quarter of asymptomatic people, contagious patients even two days before triggering symptoms. How do you want to fight that without confining or testing everyone? If this is confirmed, it really means that getting the vaccine is a step not only to protect yourself from the disease but also to prevent the virus from circulating between people. This means that getting vaccinated would really become an altruistic gesture.



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