RFID or radio frequency identification tags consist of silicon chips and an antenna that can transmit data to a wireless receiver. It is predicted that in the near future, virtually everything from soda cans to cereal boxes.will contain a traceable tag. Recently John's Hopkins Medical Center signed up to become one of the first hospitals to use radio-frequency ID tags to track drugs. These will be used to track intravenous fluid bags, which will contain the RFID tags on each IV bag label.
According to an article in Forbes, in addition to Hopkins, the Red Cross and pharmaceutical companies are looking into this technology.
Wired article about RFID tags
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