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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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After 5 years of being diagnosed with rheumatoid arthritis, one every three patients will no longer be able to work.
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More than 2,500 barbiturates have been synthesized. At the height of their popularity, about 50 were marketed for human use.
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The longest a person has survived after a heart transplant is 24 years.
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Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.