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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.
Blastomycosis is often misdiagnosed, resulting in tragic outcomes. It is caused by a fungus living in moist soil, in wooded areas of the United States and Canada. If inhaled, the fungus can cause mild breathing problems that may worsen and cause serious illness and even death.
Nearly 31 million adults in America have a total cholesterol level that is more than 240 mg per dL.
Human kidneys will clean about 1 million gallons of blood in an average lifetime.
Cancer has been around as long as humankind, but only in the second half of the twentieth century did the number of cancer cases explode.