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Other countries limit or forbid plasma donations, but the U.S. allows companies to pay donors and has comparatively loose standards for monitoring their health. And while most U.S. centers receive around 1,000 paid donations a week, centers at the border count more than 2,300.NEXT ARTICLE
Blood is a specialized bodily fluid that delivers necessary substances to the body's cells (in animals) – such as nutrients and oxygen – and transports waste products away from those same cells. In vertebrates, it is composed of blo...