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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
More than 150,000 Americans killed by cardiovascular disease are younger than the age of 65 years.
People with alcoholism are at a much greater risk of malnutrition than are other people and usually exhibit low levels of most vitamins (especially folic acid). This is because alcohol often takes the place of 50% of their daily intake of calories, with little nutritional value contained in it.
Complications of influenza include: bacterial pneumonia, ear and sinus infections, dehydration, and worsening of chronic conditions such as asthma, congestive heart failure, or diabetes.
This year, an estimated 1.4 million Americans will have a new or recurrent heart attack.