Heard about those flesh-eating Costa Rican bananas. Pure fiction, of course, but such rumors abound on the Internet. For some amusing reading on the latest tall tales, check out this site hosted by the Centers for Disease Control and Prevention. The centers' experts provide calm, factual information on such matters as why scientists consider HIV the cause of AIDS and why bananas can't spread the bacteria that cause necrotizing fasciitis (the microbes are unlikely to live long on the fruit). Other worries plaguing the populace include claims that a mysterious organization called the Klingerman Foundation is mailing out packages containing a dangerous virus.