Later reports on this are showing no new infectious disease as the cause, and the consensus seems to be that the likely cause is basically a hangover from lockdown with the population having a lower resistance to normal respiratory infections due to lack of exposure.
This as well. The theory of immunity being weakened by lack of exposure is highly questioned and subject to debate.
However, I'd concede it matters a bit more in children who have yet to build up their immune systems in the first place. Adults? Nah.
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