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Amoebae are the simplest type of protozoans, and are characterized by a feeding and dividing trophozoite stage that moves by temporary extensions called pseudopodia or false feet.
After 5 years of being diagnosed with rheumatoid arthritis, one every three patients will no longer be able to work.
Before a vaccine is licensed in the USA, the Food and Drug Administration (FDA) reviews it for safety and effectiveness. The CDC then reviews all studies again, as well as the American Academy of Pediatrics and the American Academy of Family Physicians. Every lot of vaccine is tested before administration to the public, and the FDA regularly inspects vaccine manufacturers' facilities.
This year, an estimated 1.4 million Americans will have a new or recurrent heart attack.
About 3% of all pregnant women will give birth to twins, which is an increase in rate of nearly 60% since the early 1980s.