Vaccinating bats could be good for people. But how do you vaccinate a bat?

Bats such as this greater horseshoe bat can harbor dangerous viruses. Researchers present new evidence that it might be possible to immunize the winged mammals to protect them — and us — from potentially lethal diseases.

In a new study, bats lap up vaccine-laced saline or chow down on vaccine-carrying mosquitoes. Will that have any impact on the flying mammal's immune system?

(Image credit: DeAgostini)