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Did you know?
Malaria was not eliminated in the United States until 1951. The term eliminated means that no new cases arise in a country for 3 years.
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.
Did you know?
The familiar sounds of your heart are made by the heart's valves as they open and close.
Did you know?
Human kidneys will clean about 1 million gallons of blood in an average lifetime.
Did you know?
Cyanide works by making the human body unable to use oxygen.