Match the following:
ColumnAColumnBYellowfeverEpidemicPlaguePandemicAIDSEndemicCholeraSporadic
1-iii, 2-i, 3-ii, 4-iv
Yellow fever is an endemic disease as it is found in a certain area and affects very few people. Plague is an epidemic disease as it affects a large number of people at the same time. AIDS is a pandemic disease because it is widely distributed worldwide and cholera has scattered individual cases, therefore, it is a sporadic disease.