Avian Influenza
What is avian influenza? Three subtypes of avian influenza A viruses are known to infect people: H5, H7 and H9 viruses. Among these, Asian-lineage H5N1 and H7N9 have caused the majority of human…
Acute Flaccid Myelitis
Acute flaccid myelitis (AFM) is a rare but serious condition that affects the nervous system, specifically the spinal cord, and causes suddenonset of weakness in limbs (one or more arms or legs) and…
Handwashing
Hands are the most common mode of transmission of disease causing agents. By washing your hands, you can prevent the spread of many infectious diseases and lower your risk of getting, or passing…
Information for the Public and Providers
Pertussis Orange County and California have seen a large increase in pertussis cases in 2014. Orange County has had twice as many reports of pertussis so far this year compared to the same time…
Travelers Health
Plan ahead for travel outside the United States. Vaccines generally take at least 2 weeks to 1 month to become effective. Learn about potential health risks and how to prevent exposure to illness…
General Information
HIV Statistics HIV Plans/Reports
HIV Planning and Coordination
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Disable Popup Blocker
At times it may be necessary to disable your browser's Pop-up Blocker when viewing a site that contains useful pop-up windows (online training). Below is a simple example of how to disable the Pop-up…
Disease Information Prevention
Diseases Index - A-Z Disease Prevention Foodborne Illness FAQ