SPECIAL REPORT: Experts warn giving too much plasma can be dangerous
College students and lower-income individuals are more likely to sell their plasma, risking long-term health problems from doing it too often.
Read MoreCollege students and lower-income individuals are more likely to sell their plasma, risking long-term health problems from doing it too often.
Read MoreNo further information was available. But USC authorities said there was no ongoing threat to students.
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