What would you do or say to persuade a covid-19 skeptic that the pandemic is real?

Suppose you have someone close by
•  who doubts all the published stories, saying they’re “just stories,” meaning false,
•  who thinks the pandemic hoax is being pushed for the financial gain of a few and political control of the populace,
•  who doesn’t know anyone personally who has or has had the virus (and neither do I),
•  and who claims that his routine proximity to people who, like him, are unmasked proves that there’s no real risk?

What kind of proof could you offer this person in order to insist that he take precautions?

As always, it’s not just the risk he takes on his own behalf but the risk he poses to others.

Saying that he should be denied the company of people who don’t share his belief and don’t want to be exposed may be true, but is not an answer to the question.

In other words, I’m asking not “What should I do about him?” but “What would constitute proof?” What would be evidence, not what would be your advice?