Who discovered "vaccine" for the first time?

Fill in the blanks.

(a) Pneumonia is an example of .... disease.

(b) Many skin diseases are caused by ..........

(c) Antibiotics commonly block biochemical pathways important for the growth of ........

(d) Living organisms carrying the infecting agents from one person to another are called

Name the target organs of the following diseases :

(a) Hepatitis targets ………

(b) Fit or unconsciousness targets

(c) Pneumonia targets ...............

(d) Fungal disease targets

Name two diseases which can be prevented by using vaccines.

Name any two groups of microorganisms from which antibiotics could be extracted.