Courtesy DesmodusHoly moly!
Vampire bats have been attacking people living in the Amazon rainforest in Peru! And it turns out that the bats have rabies! 500 people have been attacked, and four people have died (all of the fatalities, tragically, have been kids).
The articles I found on the attacks don't make a link between the attacks and the rabies—it seems that some South American populations of vampire bats just have a higher incidence of rabies. (Bats, in general, have a relatively low incidence of the disease; only 0.5% of bats carry the virus.)
It's unusual for vampire bats to attack humans. Typically they will feed on the blood of sleeping animals, but if their prey species become scarce, they will sometimes turn to humans for food. According to the BBC article on the attacks, some experts believe that destruction of the bats habitat, and the ensuing scarcity of prey, have caused them to attack humans, or that the attacks are the result changing temperatures in the Peruvian Amazon in recent years.
In any case, I'd get prepared if I were y'all. Holy water, crosses, wooden stakes, and tennis rackets.