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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.
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.
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More than 150,000 Americans killed by cardiovascular disease are younger than the age of 65 years.
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Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.
Did you know?
If all the neurons in the human body were lined up, they would stretch more than 600 miles.