: Does Covid-19 immunity last forever or does it fade with time? #IndiaNEWS The Covid-19 vaccines are working. Data from Israel and Scotland show that they are protecting people and may also be decreasing

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Does Covid-19 immunity last forever or does it fade with time? #IndiaNEWS
The Covid-19 vaccines are working. Data from Israel and Scotland show that they are protecting people and may also be decreasing the spread of the SARS-CoV-2 virus. If it all holds up, people will be protected from severe disease, the amount of virus will progressively decrease, and we can truly plan for a way out of the pandemic.Evidence is also growing that once you have been infected, there is a pretty good chance that you will be protected from further infections, or at the very least, have less severe disease. This makes sense, as it is why your immune system evolved in the first place.Over millions of years, the immune system was sculpted by the laws of natural selection. Once you have been infected or vaccinated, memory B and T cells persist. When you are reinfected, they wake up and eliminate the infection to such an extent that you will not even feel sick. You can see how this made evolutionary sense. Feeling sick means you are less likely to procreate, so there would have been a survival advantage to immunity.However, an important question in immunology, when it comes to infectious diseases and vaccines, is: how long protection might last? There are several variables here, from the...Read more

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