In developing countries, domestic animals (eg, dogs) are common sources of infection. In the United States,
bats and wild animals (eg, raccoons) are the most common reservoirs of infection. The acquisition of rabies
from bats can occur from an unrecognized bite or a scratch, and possibly by inhalation of aerosolized viral
particles. Bats are found in all states except Hawaii, and spelunking (cave exploration) is a risk factor for
rabies acquisition from bats.