Did you know?

More than 50% of American adults have oral herpes, which is commonly known as "cold sores" or "fever blisters." The herpes virus can be active on the skin surface without showing any signs or causing any symptoms.

Did you know?

Earwax has antimicrobial properties that reduce the viability of bacteria and fungus in the human ear.

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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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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.

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Medications that are definitely not safe to take when breastfeeding include radioactive drugs, antimetabolites, some cancer (chemotherapy) agents, bromocriptine, ergotamine, methotrexate, and cyclosporine.

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