Are lesbians at any risk of getting AIDS?
Yes, but usually with more difficulty.
To have a chance of getting AIDS,
you need to exchange body fluids (exception: saliva) with an infected.
Even a tongue kiss can theoretically infect you,
though saliva inhibits the HIV-virus somewhat.
But if you have some micro-wounds in your mouth (or throat) and kiss with
an infected who's got a bit of blood in his saliva, there's a chance.
Basically, the more direct and violent sexual contact is,
the more likely you'll be infected.
Of course you can't be infected if the other one isn't.