Cases of word usage

1) a kind of infectious and often fatal disease, common in hot countries (cholera)

2) the process of infecting or being infected, especially the communication of disease through the air or water; an infectious disease (infection)

3) (usual short form 'flu') an infectious disease with fever, aches and bad cold (influenza)

4) any of various poisonous living things, smaller that bacteria, causing the spread of infectious disease (virus)

5) a kind of infectious tropical skin disease (yaws)