“The world population is well protected against COVID-19 after a contagion of coronavirus as when she was vaccinated against the disease ”, concluded a scientific study published yesterday.
He job suggests that the level and duration of protection against reinfection, symptomatic disease, and severe disease is at least comparable to that offered by two doses of mRNA vaccines such as Moderna and Pfizer-BioNtech in the case of Alpha, Delta, and Omicron variants.
“Vaccination is the safest way to acquire immunity. Acquiring natural immunity must be weighed against the risks of severe disease and death associated with the first infection,” lead author Stephen Lim, a researcher at the Washington University School of Medicine, said in a statement to The Lancet. .
To do the work, some 60 pre-existing investigations were compiled, going back several years. (REUTERS/Hannah Beier/File Photo)
The protection of natural immunity against reinfection is around 85% at ten months in the case of the Alpha and Delta variants, while in the case of the Omicron BA.1 that safeguard drops to 36% after that period of time. However, the protection is 90% at ten months in the Alpha and Delta variants against hospitalization and death, and 88% in the case of the Omicron BA.1, according to the analysis of 65 different studies carried out in 19 countries.
The weaker protection in the case of the Omicron variant and its subvariants “reflects the mutations that have allowed them to escape immunity more easily than other variants,” said Hasan Nasserldine, co-author of the paper.
The work was published by the British weekly “The Lancet”, specialized in international medicine, having an unprecedented impact due to the magnitude of its conclusions. Some 60 pre-existing investigations are compiled, “with a setback of several years and takes into account the emergence, at the end of 2021, of the Ómicron variant.”
The study offers a more precise vision of what can be expected from the development of a “hybrid immunity” in the population. (REUTERS/Tyrone Siu/File Photo)
The thesis was based on comparing the most effective vaccines against covid-19 and which are the mainstays of vaccination campaigns in many Western countries, although the subject is not new and many other studies have tried to compare the risks of contracting the virus again, depending whether one is vaccinated or has already been infected.
In this sense, the Ómicron variant proved to be much more contagious than its predecessors and capable of infecting numerous vaccinated people, without thereby running a high risk of suffering a severe form of the disease.
The study concludes that the same is true in case of previous coronavirus infection. The protection is rather weak against a reinfection with the omicron variant, but strong against a more severe form, comparing the antibodies after the vaccine and those acquired by the infection. These results do not mean that it is indifferent to get vaccinated or infected to later acquire a first immunity. From now on it is much more risky to get sick, due to its consequences, especially in the case of the elderly.
The work was published by the British weekly “The Lancet”, specialized in international medicine. (REUTERS/Eric Gaillard/File Photo)
However, this study published in “The Lancet” offers a more precise vision of what can be expected from the development of a “hybrid immunity” in the population, as many more individuals have been vaccinated and have become infected with the virus. least once. The results suggest that future waves of Covid will lead to low levels of hospitalization, the medical study concludes.
Although it has been talked about for a long time and there have been studies that have tried to compare the risks of contracting the virus again, depending on whether one is vaccinated or has already been infected, this work by The Lancet is of an unprecedented magnitude. “Although an infection provides protection that decreases over time, its level seems as long lasting, or even longer, than that conferred by the vaccination itself,” the published study concluded.
Source: Infobae
