Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
Did you know?
Not getting enough sleep can greatly weaken the immune system. Lack of sleep makes you more likely to catch a cold, or more difficult to fight off an infection.
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Vaccines prevent between 2.5 and 4 million deaths every year.
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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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Blood in the urine can be a sign of a kidney stone, glomerulonephritis, or other kidney problems.
A closer look at the structure and function of photosystem II
The structure of the placenta
Cell Structure
The lymph node structure.
The molecular structure of methanol showing the one carbon atom, four hydrogen atoms, and one ...