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Opinion Superbugs are rising again. Hospitals must regain the edge.

Antibiotic resistance is a global public health crisis, a shadow pandemic, says Peter Bergen. It threatens the effectiveness of medicines vital for surgery, chemotherapy, organ transplants, he says. Bergen: It has been known for decades that bacteria evolve to resist antibiotics, and that overuse in human health and animal agriculture have contributed to the worsening situation. It is critical to distribute antibiotics judiciously, treating them as a valuable resource for all, Bergen says. The pandemic should not be allowed to reverse the progress that has been made — and can be made again, says Bergen, who says it is a long-term challenge.