a) Cholera can be prevented by maintaining proper sanitation practices and proper hygiene, boiling water before drinking, avoid eating uncovered food and food from vendors.

b) Typhoid can be prevented by maintaining proper personal hygiene and sanitation practices, eating properly cooked food, drinking boiled water, getting vaccinated from this disease.

c) Hepatitis A can be prevented by taking the vaccine, drinking boiled water, properly cooked food etc.