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As a rule, don't use the definite article before the names of diseases.
The indefinite article is needed with common names of illnesses: I was suffering from a cold (a fever, a cough, a headache).
Don't use an article before the names of games like football, hockey, tennis, cricket, volley-ball, basket-ball.
Don't use the article after the relative determiner whose, because it takes the place of the article,
Use man, denoting the human race, without the definite article. Also, mankind requires no article: Disease is the enemy of mankind.