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Author Question: ________, which are specialized video cameras, provide an interactive way to conduct meetings with ... (Read 304 times) |
Autoimmune diseases occur when the immune system destroys its own healthy tissues. When this occurs, white blood cells cannot distinguish between pathogens and normal cells.
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.
Interferon was scarce and expensive until 1980, when the interferon gene was inserted into bacteria using recombinant DNA technology, allowing for mass cultivation and purification from bacterial cultures.
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.
In most cases, kidneys can recover from almost complete loss of function, such as in acute kidney (renal) failure.