Question

how disease are caused​

Answer 1

Answer:

Infectious diseases are disorders caused by organisms — such as bacteria, viruses, fungi or parasites. Many organisms live in and on our bodies. They're normally harmless or even helpful. But under certain conditions, some organisms may cause disease. Some infectious diseases can be passed from person to person

Answer 2

here is your answer

Disease can be caused by many organism they can be animals, insects etc. I think most of the disease are caused by insects.

Like mosquitoes there are some mosquitoes that can spread disease Like malaria dengue etc.

hope this helps you