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?
There are more bacteria in your mouth than there are people in the world.
Did you know?
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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Blood is approximately twice as thick as water because of the cells and other components found in it.
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The B-complex vitamins and vitamin C are not stored in the body and must be replaced each day.
One page of color vision chart.
Distribution of skin color as measured by a reflectometer at a wavelength of 685 nm. The results are