Tom and Jim go running together once a week. This week Jim skipped his warm up before exercising, because he was a bit late. Tom warmed up properly before running. Which runner has a higher chance of getting a muscle injury?
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Answer: Jim

Dean and Paul both went to volunteered in Africa. They had a blood test when they came back. Paul had been infected with the HIV virus while Dean was healthy and clean. Which friend does not have a virus that is transmitted by sexual contact?
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Answer: Dean

Brad and Henry were two old friends in their 70's. Brad had very high levels of cholesterol, while Henry was healthier and had normal levels of cholesterol. Which friend takes a drug that removes cholesterol from plasma?
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Answer:
Brad