While the number of hospitalizations related to Covid-19 in France continues to rise, two studies look at acquired immunity after infection with the virus and after vaccination. The verdict is clear: it is better to vaccinate after you have contracted the virus.
Does your body protect against SARS-CoV-2 better after infection or vaccination? Two teams of researchers tried to answer this question! Two studies were published in the journal on Friday, April 1. Lancet infectious diseases come to the conclusion that It is better to vaccinate after contracting the virus† Thus, the immunity granted after Covid-19 infection will be strengthened after vaccination.
Boost immunity…
The first of these studies was conducted in Brazil The country has been hard hit by the pandemic, with nearly 660,000 virus-related deaths in the past two and a half years. The work was based on clinical data from nearly 200,000 Brazilians infected with the virus. A sample of patients did not receive any dose of the vaccine. After an observation period, some of these patients received a dose of vaccine from Pfizer/BioNTech, AstraZeneca, Sinovac or Johnson & Johnson-Janssen.
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discovery? Julio Croda, co-author of the study, explains that the Pfizer-BioNTech vaccine, for example, reduced the risks of hospitalization and death by nearly 90% after injection and contamination.
… overtime
The second study, conducted in Sweden, goes in the direction of the first. Thus, the document confirms that people infected with the virus who are vaccinated after infection benefit from high immunity for about 20 months. This system will also reduce the risk of reinfection by more than 65%.
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The fact remains that these two studies were conducted before the emergence and spread of the Omicron variant (and its little brother BA.2), which greatly disrupted the epidemiological landscape. The variant discovered in South Africa is not only more contagious than the delta variant, but also shows some resistance to the vaccines used today. However, these two studies suggest that “hybrid immunity, obtained by exposure to both infection and vaccination, […] It can provide long-term protection, also against new variants,” explains Professor Pramod Kumar, the Indian researcher.
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More than 22,000 infected people are currently in hospital in France. There are currently 1,500 patients in intensive care: the number has been steadily rising for more than a week.
Vaccination: what are the recommendations in case of infection?
If you have the virus but are waiting for a dose of the vaccine, the Haute Autorité de Santé recommends that “immunologically competent persons” be vaccinated with a single dose of the vaccine, preferably two to six months after infection.
be careful ! If an infection occurs after starting or completing a vaccination, it is essential to contact your healthcare provider.
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