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Why do they say that Covid-19 could become seasonal? India News


NEW DELHI: This pandemic may seem endless, its trail of destruction boundless. But all pandemics come to an end, and this one will too. The end, however, would not be an elimination of the coronavirus, not even a scenario in which we have achieved herd immunity to practically stop transmission. Scientists say that Covid-19 could become seasonal. In other words, the coronavirus will become endemic.
“Almost everyone has some form of immunity against natural infection and / or vaccination and / or one after the other, and that will persist long enough that they don’t really get sick when they get it again. And then we went endemic, ”Marc Lipsitch, an infectious disease epidemiologist at Harvard’s TH Chan School of Public Health, tells Stat.
Past pandemics show that this is likely. The 1918 flu pandemic, 1952 H2N2 pandemic, 1968 H3N2 pandemic, and 2009 H1N1 pandemic caused the pathogen to become endemic.
These pandemics ended without a large-scale deployment of vaccines around the world. Humans did not develop herd immunity to them either. Viruses, on the other hand, became endemic.
Our immune systems learned enough about them to fend off the deadliest manifestations of infection, at least most of the time, Stat explains. Rather than causing tsunamis of devastating disease, viruses eventually came to unleash small waves of milder disease.
Now, scientists say the pattern could also hold true for Sars-Cov2. Jennie Lavine, Emory University Biology Research Fellow, author of a modeling paper published in Science that visualized how Covid-19 could become endemic, our immune systems trained, through exposure to infection or through vaccination or both, it will probably become the future Covid-19. infections the equivalent of a cold.
Does that mean vaccines are less important? No. Quite the contrary.
Scientists say the impact of these seasonal Covid-19 episodes would be uneven across countries. Countries with a high vaccination rate may be better off, while the less privileged population may be more affected.
Mind you, this is not a defined science. Pandemics in the past were caused by influenza viruses. Covid-19 is caused by a coronavirus.
Will that drastically change the scene? These scientists are of the opinion that it will not.

Original source