At this point it’s highly unlikely that there remains a human in an urban center that has not caught covid once. Maybe they didn’t have symptoms, maybe they didn’t notice, but they’ve had covid.

That or they’re a hermit.

Yeah people are confusing subclinical disease with not ever having it. Outside of total extreme isolation you had it at some point. You didn’t know you had it. You were in denial about having it. But you had it.

Tests are not 100 percent sensitive. Or many people just chose not to test themselves. But if you were interacting with the general population in the past 3 years you have had covid.