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Russia has the highest death rate from cardiovascular disease followed by the Ukraine, Romania, Hungary, and Poland.
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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
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According to the Migraine Research Foundation, migraines are the third most prevalent illness in the world. Women are most affected (18%), followed by children of both sexes (10%), and men (6%).
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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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Pubic lice (crabs) are usually spread through sexual contact. You cannot catch them by using a public toilet.