Covid-19. Experts fail group immunity: “It is a dangerous fallacy without scientific evidence”


The pandemic stopped the world, left life in suspense, and since the covid-19 emerged that the various countries have jumped from restrictions on restrictions, from confinement to confinement, from calamities to emergencies, in successive blocks towards a “new normal ”, All in an attempt to halt the spread of the new coronavirus, while others point to an alternative, more risky way, that of allowing SARS-CoV-2 to spread throughout society, in order to create the so-called group immunity.

The adoption of this strategy was even tested in some countries, such as the United Kingdom, Sweden and the Netherlands, nations that initially opted for “selective isolation”. But the idea of ​​allowing the virus to ride freely across the population – protecting risk groups – has never been consensual and has always aroused several criticisms. Through an open letter, now published in the scientific journal “The Lancet”, a group of 80 researchers considers group immunity “a dangerous fallacy without scientific evidence”, writes “El País”.

The experts who sign the document warn that the absence of control measures would increase mortality in the entire population, affect the economy irreversibly, prolong the pandemic and lead to the collapse of national health systems.

In the opinion of these researchers, the option for group immunity would leave many individuals at the mercy, since “the proportion of vulnerable people constitutes up to 30% of the population in some regions”, something that leads them to defend that “any strategy of pandemic that depends on the immunity of natural infections by the new coronavirus is erroneous ”.

In the same vein, the World Health Organization’s chief scientist, Soumya Swaminathan, estimates that 77 million people would die from the new coronavirus if the idea of ​​creating group immunity were implemented globally.

In addition, adds the WHO official, to achieve a hypothetical group immunity, it would be necessary that at least 70% of individuals develop antibodies, but this, he stresses, would be a process that would take a long time.


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