This guidance on wearing masks may change because of a pandemic in which large numbers of seemingly healthy people are unknowingly ill.
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Superbugs: Why antibiotic resistance is a fast-growing crisis
Antibiotic resistance occurs when a bacteria, fungi, or parasite is no longer curable by medicines previously able to treat them.
Zika virus: What Oklahomans need to know
How can you best protect yourself from the Zika virus?