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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Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.
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Fewer than 10% of babies are born on their exact due dates, 50% are born within 1 week of the due date, and 90% are born within 2 weeks of the date.
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About 100 new prescription or over-the-counter drugs come into the U.S. market every year.
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The FDA recognizes 118 routes of administration.
Animal Cell Key
Steps in the humoral and cell-mediated immune response
Plant Cell
Wiring diagram of a typical Ford electronic ignition.
Write the equation for the population y at any instant