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Did you know?
Vaccines prevent between 2.5 and 4 million deaths every year.
Did you know?
The average human gut is home to perhaps 500 to 1,000 different species of bacteria.
Did you know?
As of mid-2016, 18.2 million people were receiving advanced retroviral therapy (ART) worldwide. This represents between 43–50% of the 34–39.8 million people living with HIV.
Did you know?
In the ancient and medieval periods, dysentery killed about ? of all babies before they reach 12 months of age. The disease was transferred through contaminated drinking water, because there was no way to adequately dispose of sewage, which contaminated the water.
Did you know?
The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.