It’s been known since fall 2020 but it was never acknowledged by the press.
Not so novel coronavirus?
At least six studies have reported T cell reactivity against SARS-CoV-2 in 20% to 50% of people with no known exposure to the virus.5678910
In a study of donor blood specimens obtained in the US between 2015 and 2018, 50% displayed various forms of T cell reactivity to SARS-CoV-2.511 A similar study that used specimens from the Netherlands reported T cell reactivity in two of 10 people who had not been exposed to the virus.7
Other countries have varying degrees with the US being the highest at 50% at the time. And these blood samples are from 2015-2018.
thank you
No problem.
It’s like these researchers are acting like this is a new phenomenon when they should know how an immune system works and a simple Google search pulls up the results.
Coronaviruses change very little roughly .01 to .03 from the original. So when they announce a new variant with 32 or 46 mutations how many parts didn’t change?
You will also have cross immunity that can last a lifetime and if you do catch it at most it should be mild but there are exceptions.
Most flus though mutate too much each year to have cross immunity but certain years they’ll announce if you had the flu in year 19xx or 20xx you’re immune from this years flu since it’s extremely similar to previous flus.
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