Is everyone tested every year for anti-bodies to the raft of flu viruses, which kill millions every year?
And Covid-19 should be different, because???
How much is the “flu vaccine” protecting us and how much is the built up herd immunity to the flug bugs protecting us? Do they over sell the “flu vaccine” and under appreaciate the built up herd immunity to the seasonal flu bugs?
On a personal note, I have never ever had the flu vaccine and never ever had a serious flu illness.
.. there is no vaccine or verified effective treatment.