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HIV testing reach is still limited. An estimated 40% of people with HIV (more than 14 million) remain undiagnosed and do not know their infection status.
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The types of cancer that alpha interferons are used to treat include hairy cell leukemia, melanoma, follicular non-Hodgkin's lymphoma, and AIDS-related Kaposi's sarcoma.
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Pubic lice (crabs) are usually spread through sexual contact. You cannot catch them by using a public toilet.
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The familiar sounds of your heart are made by the heart's valves as they open and close.
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A seasonal flu vaccine is the best way to reduce the chances you will get seasonal influenza and spread it to others.