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Intradermal injections are somewhat difficult to correctly administer because the skin layers are so thin that it is easy to accidentally punch through to the deeper subcutaneous layer.
Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
A recent study has found that following a diet rich in berries may slow down the aging process of the brain. This diet apparently helps to keep dopamine levels much higher than are seen in normal individuals who do not eat berries as a regular part of their diet as they enter their later years.
Aspirin is the most widely used drug in the world. It has even been recognized as such by the Guinness Book of World Records.
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.
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