Hardly an unknown.
Unless you get your news/information from Hollywood and the mainstream media. Which is tens-of-millions of Americans. (Sadly.)
And I forgot: the public schools and the govt.
“Hardly an unknown.”
I once cited (with links) the CDC stats on HIV to a liberal - to demonstrate that homosexuals have a much higher incidence of HIV than the general population.
Her response was classic liberal: “That’s old data”.
Trust me - for around 20 years now, school kids have been taught that you get HIV from dirty needles, and it has nothing to do with sexual preference. I would guess your average school teacher, journalist, politician believes it.