You are aware of the $Polio$ $Eradication$ $Programme$ in your city. Children are vaccinated because:

Why is $AIDS$ considered to be a 'Syndrome' and not a disease?

State in tabular form the modes of transmission of each of the following diseases:
$(a)$ Syphilis
$(b)$ Tuberculosis
$(c)$ Jaundice
$(d)$ Japanese encephalitis

$(a)$ Why do parents immunize their newborn babies?
$(b)$ What are the ways to prevent mosquitoes from breeding?

About a hundred years ago,when smallpox persisted,a group of people who had this disease earlier and had survived it had no chance of suffering from it again. So,having the disease once was a means of preventing subsequent attacks of the same disease.
$(a)$ Why does this happen? Explain.
$(b)$ We can 'fool' the immune system. Clarify.
$(c)$ Name this principle of prevention of diseases.

Name any three diseases transmitted through vectors.