okay let's put it specifically from NYT since everyone thinks I am Pollyanna: "In official language of research science, vaccine is typically considered effective only if it prevents people from coming down with any degree of illness..." https://www.nytimes.com/2021/02/01/briefing/vaccination-myanmar-coup-rochester-police.html

"With a disease that’s always or usually horrible, like ebola or rabies, that definition is also the most meaningful one.
But it’s not the most meaningful definition for most coronavirus infections. Whether you realize it or not, you have almost certainly had a coronavirus. "

"Coronaviruses have been circulating for decades if not centuries, and they’re often mild. The common cold can be a coronavirus. The world isn’t going to eliminate coronaviruses — or this particular one, known as SARS-CoV-2 — anytime soon. Yet we don’t need to eliminate it for"