PCR is useful tool for early diagnosis of an infectious disease. Comment.

Define infectious diseases.

Name two infectious diseases of fishes.

Name an infectious disease which is fatal?

What are general ways of preventing infectious diseases ?

"Maintenance of personal and public hygiene is necessary for prevention and control of many infectious diseases." Justify the statement giving suitable examples.

What precautions could you take in your school to reduce the incidence of infectious diseases ?

Why are communicable diseases called infectious diseases ?