A new government study reveals that U.S. doctors are prescribing enough antibiotics to give them to four out of five Americans every year, an alarming pace that suggests they are being overused.
Overuse is one reason that antibiotics are losing their strength, making infections harder to treat.
Click the video to see Karen McNew's report on changes that some doctors are making in the way they prescribe antibiotics.
The study comes from the Centers for Disease Control and Prevention.
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