The US hasn't seen a human bird flu case in 3 months. Experts are wondering why - Medical Xpress

1. The US hasn't seen a human bird flu case in 3 months. Experts are wondering why  Medical Xpress
2. Bird flu in humans hasn't officially been seen in U.S. in 3 months: "We just don't know why"  CBS News
3. The worst of avian flu outbreak may be over in California, health officials say  San Francisco Chronicle
4. The US hasn’t seen a human bird flu case in 3 months. Experts are wondering why  Colorado Hometown Weekly
5. The US hasn't seen a human bird flu case in three months. Experts are wondering why  Stuff

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