Question

why do we fall ill question and answer

Answer 1

we fall ill mostly because of low immunity

Answer 2

Hey mate here is your answer.....
eans of Spreading the Infection: By Air: Some of the pathogens (harmful and disease causing microbes) spread through air. For example; when a person suffering from common cold sneezes or coughs, viruses come out along with fine droplets of mucus. The virus then easily enters another person's body.

Hope this will help you....