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Did you know?
The horizontal fraction bar was introduced by the Arabs.
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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.
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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
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Immunoglobulin injections may give short-term protection against, or reduce severity of certain diseases. They help people who have an inherited problem making their own antibodies, or those who are having certain types of cancer treatments.
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The heart is located in the center of the chest, with part of it tipped slightly so that it taps against the left side of the chest.