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Content on this page was developed during the 2009-2010 H1N1 pandemic and has not been updated.

  • The H1N1 virus that caused that pandemic is now a regular human flu virus and continues to circulate seasonally worldwide.
  • The English language content on this website is being archived for historic and reference purposes only.
  • For current, updated information on seasonal flu, including information about H1N1, see the CDC Seasonal Flu website.

H1N1 Flu Daily Update: April 30, 2009

U.S. Human Cases of Swine Flu Infection
(As of April 30, 2009 11:00 AM ET)
# of laboratory confirmed cases
Arizona 1  
California 14  
Indiana 1  
Kansas 2  
Massachusetts 2  
Michigan 2  
Nevada 1  
New York 51  
Ohio 1  
TOTAL COUNTS 91 cases 1 death
International Human Cases of Swine Flu Infection
See: World Health Organization
NOTE: This is a rapidly evolving situation and current guidance and other web content may contain variations in how this new H1N1 virus of swine origin is referred to. Over the coming days and weeks, these inconsistencies will be addressed, but in the interests of meeting the agency's response goals, all guidance will remain posted and new guidance will continue to be issued.

In response to an intensifying outbreak in the United States and internationally caused by a new influenza virus of swine origin, the World Health Organization raised the worldwide pandemic alert level to Phase 5 on April 29, 2009. A Phase 5 alert is a “strong signal that a pandemic is imminent and that the time to finalize the organization, communication, and implementation of the planned mitigation measures is short.”

The United States Government has declared a public health emergency in the United States. CDC’s response goals are to reduce transmission and illness severity, and provide information to help health care providers, public health officials and the public address the challenges posed by this emergency. CDC is issuing and updating interim guidance daily in response to the rapidly evolving situation. CDC’s Division of the Strategic National Stockpile (SNS) continues to send antiviral drugs, personal protective equipment, and respiratory protection devices to all 50 states and U.S. territories to help them respond to the outbreak. The swine influenza A (H1N1) virus is susceptible to the prescription antiviraldrugs oseltamivir and zanamivir. In addition, the Federal Government and manufacturers have begun the process of developing a vaccine against this new virus.

Past Daily Updates

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