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H1N1 flu (swine flu) - Symptoms and causes - Mayo Clinic
Swine influenza - Wikipedia
Swine Flu (H1N1): What Is It, Causes, Treatments & Prevention
About Swine/Variant Flu | Swine Flu | CDC - Centers for Disease …
H1N1 Flu Virus (Swine Flu): Symptoms, Causes, Tests, and Treatments - WebMD
Swine Flu: Risk Factors, Causes & Symptoms - Healthline
H1N1 flu (swine flu) - Diagnosis and treatment - Mayo Clinic
Swine flu: Causes, symptoms, and treatment - Medical News Today
About Influenza in Swine (Pigs) | Swine Flu | CDC
H1N1 | Swine Flu - MedlinePlus