The Food and Drug Administration (FDA) uses lab animals to test the effects of some medical products, like drugs and vaccines, before the drugs move on to clinical trials using human test subjects. Each year, around 800,000 animals are used in regulated laboratory facilities. The FDA has plans to reduce the use of dogs, cats, and primates in testing, but the agency says some animal testing is necessary. It gives them an insight into things like how quickly medication is absorbed into the body, and how quickly it wears off.

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