Since immunity appears to wane after six months, should all of us be getting a new booster

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7. covid Virus is present in all public places

where many people are present. When I go to any large store, there are several hundred people there, and for sure a handful are infected without symptoms. So I am continually getting exposed to the virus, and building natural immunity all the time.

If the virus inhaled is small quantity, we will not show symptoms. However even asymptomatic virus inhalation produces additional immunity. This happens with all viruses, not just covid. This is basically known as herd immunity.

We all needed the vaccines at the beginning of pandemic when covid arrived, because none of us had any immunity from previous exposure. I was full vaccinated 8 months ago, and I have resumed normal life with regular visits to restaurants, stores and going on cruises. So in my opinion, I may not need 3rd shot of vaccine. My body gains immunity with exposure all the time.