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Did you know?
Vaccines cause herd immunity. If the majority of people in a community have been vaccinated against a disease, an unvaccinated person is less likely to get the disease since others are less likely to become sick from it and spread the disease.
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Today, nearly 8 out of 10 pregnant women living with HIV (about 1.1 million), receive antiretrovirals.
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After 5 years of being diagnosed with rheumatoid arthritis, one every three patients will no longer be able to work.
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The horizontal fraction bar was introduced by the Arabs.
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There are more nerve cells in one human brain than there are stars in the Milky Way.