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
(ii) and (iv)
Diseases that are transmitted from one person to another are infectious diseases. Influenza is a type of common cold that is transmitted through air by sneezing and cough. Allergy also spreads by transmission through air.