Bats are the only mammals that can truly fly, but it turns out that they have other unique characteristics that separate them from most (if not all) other mammals. In a project headed by Dr. Peng Zhou, an international research team did extensive studies on bats.
Bats are hosts to 100 different viruses, many of which are harmful or even lethal to humans.
1. The team wanted to discover how bats can carry so many, and such deadly, viruses without getting sick themselves.
Turns out that bats have a special ability.
Check out article.
And then there’s Hendra Virus, fatal to horses and humans in Australia:
https://www.betterhealth.vic.gov.au/health/conditionsandtreatments/hendra-virus
Scientists believe that the reservoir (host) of the Hendra virus in Australia is the fruit bat (flying fox), which appears to carry the virus without suffering any ill effects, and excretes the virus in its urine. Exactly how it is transmitted from bats to horses is unknown. One theory is that the horse ingests pasture or fruit contaminated with infected bat urine, droppings or saliva. The virus in the horse’s body fluids (including blood, urine, saliva or nasal secretions) can then be transmitted to a person during close contact.