Give two examples for each of the following: (a) Acute diseases; (b) Chronic disease; (c) Infectious diseases; (d) Non-infectious diseases.

What is disease? How many types of diseases have you studied? Give examples.

Give any four factors necessary for a healthy person.

Name two diseases caused by protozoans.

What are their causal organisms?

Which bacterium causes peptic ulcers? Who discovered the pathogen for the first time?