Diseases are broadly grouped into infectious and non-infectious diseases. In the list given below, identify the infectious diseases.

i. Cancer

ii. Influenza

iii. Allergy

iv. Small pox

Influenza is an infectious disease caused by Influenza Virus. It may cause Viral, bacterial Pneumoniae and Sinus infections and can be transferred through air from cough and sneezes of infected person.

Small Pox is an infectious disease caused by two viruses Variola Major and Variola Minor. It causes sores in mouth and skin rashes. It can be transferred through contaminated objects & people.