Okay... you're right... I misspoke. It's not impossible, but the odds against it are, to quote one of my favorite movies "... tro nomical"
All I know is If I knew 8 Vapers, and 3 of them got Throat Cancer, I would think that the Planets were in Solar Alignment or something. And I would Rush Out and buy a Bunch of Lotto Tickets.
But I Wouldn't go Ocean Swimming. Especially if it was Cloudy and the Chance of Thunder Storms was Eminent.