Revised to link to updated antiviral recommendations for travelers.

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Updated Travel Health Warning: H1N1 Flu (Swine Flu) and Severe Cases of Respiratory Illness in Mexico — Avoid Nonessential Travel to Mexico

On April 23, several cases of severe respiratory illness laboratory confirmed as swine-origin influenza A (H1N1) virus (S-OIV) infection were communicated to the PAHO. Sequence analysis revealed that the patients were infected with the same S-OIV strain detected in two children residing in California. This report describes the initial and ongoing investigation of the S-OIV outbreak in Mexico.

Link:
MMWR: Outbreak of Swine-Origin Influenza A (H1N1) Virus Infection — Mexico, March–April 2009

On April 24, 2009, CDC reported eight confirmed cases of swine-origin influenza A (H1N1) virus (S-OIV) infection in Texas and California. The strain identified in U.S. patients was confirmed by CDC as genetically similar to viruses subsequently isolated from patients in Mexico.

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MMWR: Swine-Origin Influenza A (H1N1) Virus Infections in a School — New York City, April 2009

If H1N1 Flu is suspected, clinicians should obtain a respiratory swab for swine influenza testing and place it in a refrigerator (not a freezer). Once collected, the clinician should contact their state or local health department to facilitate transport and timely diagnosis at a state public health lab.

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Interim Guidance for Clinicians & Public Health Professionals

Provides interim guidance on appropriate specimen collection, storage, and processing for patients with suspected swine influenza A (H1N1) virus infection.

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Interim Guidance on Specimen Collection and Processing for Patients with Suspected Swine Influenza A (H1N1) Virus Infection

CDC Briefing on Public Health Investigation of Human Cases of Swine Influenza

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PRESS BRIEFING: April 30, 2009

CDC Briefing on Public Health Investigation of Human Cases of Swine Influenza April 30, 2009, 11:30 a.m. EST

Excerpt from:
Audio and Transcript for April 30 CDC Press Briefing

CDC Briefing on Public Health Investigation of Human Cases of Swine Influenza April 30, 2009, 11:30 a.m. EST

More here:
Audio and Transcript for April 30 CDC Press Briefing

As of 11 AM, April 30, CDC has confirmed 91 confirmed cases in 10 states. The outbreak of disease in people caused by a new influenza virus of swine origin continues to grow in the United States and internationally.

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Daily Update – H1N1 (Swine Flu) (4/30/09)

As of 11 AM, April 30, CDC has confirmed 91 confirmed cases in 10 states. The outbreak of disease in people caused by a new influenza virus of swine origin continues to grow in the United States and internationally.

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Daily Update – H1N1 (Swine Flu) (4/30/09)