Under natural conditions the disease is transmitted mainly by milk to the calf.

The airborne disease is mainly transmitted through close personal contact and is not nearly as contagious as the flu.

It is transmitted mainly by mosquitoes, which are most active in the summer, the peak of the bullfighting season.

The disease is mainly transmitted horizontally by the oro-faecal route, but rarely vertical transmission may occur.

In Panama, rabies is transmitted mainly by vampire bats.

The flulike disease is transmitted mainly by mosquitoes.

Mechanical vibration is transmitted mainly through solid structures, especially floors.

Cholera is mainly transmitted through contaminated water.

Here, as in other African countries, the virus is transmitted mainly through heterosexual contact among young adults.

P. canis is mainly transmitted from animals to humans through animal bites, scratches, or licking over wounds.