Diseases are of different types. They are:-
(i) Acute diseases:- are diseases which last only for a short period of time and does not have long term effect on health.
Eg:- cold, cough, typhoid, cholera etc.
(ii) Chronic disease:- are diseases which lasts for a long time and has long term drastic effect on health.
Eg :- diabetes, tuberculosis, elephantiasis, arthritis, cancer etc.