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Originally Posted by O.A.F.K.1.1
If I recall your hypothesis was that people already had an inherent T cell immunity.
The article does nothing to support that hypothesis.
It's a pretty big step forward. Connecting t cells to lasting "immunity" - which in this case means the immune system prevents a person from getting seriously ill, not that it will prevent the spread of the virus - is a pretty important concept. Remember, a few months ago we were thinking that people might have immunity for months, not decades.
It is obviously very difficult to prove that people might have inherent immunity, since you don't often study people who don't get sick. But the second wave has been noticeably less lethal than the first one in places that were hit hard initially. In Europe we are at a flu-level number of deaths despite massive increases in cases and conditions that many people on here predicted would lead to a substantial increase from the spring.
Eventually there is going to be a discussion about the impact of this virus in places that have had widespread exposure to previous coronaviruses, most notably Japan. And that will ultimately be the best way to study cross-reactive t cell immunity.