H5N1 Outbreak: Cambodia Reports 12th Case in 2025 — Early Symptoms and What to Watch For

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Cambodia has reported its 12th case of H5N1 avian influenza this year, as confirmed by the country’s health ministry. The latest case involves a 5-year-old boy from Kampot province, according to the Center for Infectious Disease Research and Policy (CIDRAP), citing a translated update shared on Facebook.


What Is H5N1?


Also known as bird flu, H5N1 is a highly infectious virus primarily found in birds. Although human infections are rare, they are often severe and can be fatal. Transmission typically occurs through close contact with infected poultry or contaminated environments.




Early Symptoms: Often Overlooked


H5N1 begins with common flu-like symptoms, making early detection difficult:




  • Fever




  • Cough




  • Body aches




  • Sore throat




  • Runny nose




However, symptoms can rapidly worsen and may include:




  • Shortness of breath




  • Chest pain




  • Fatigue




  • Vomiting or diarrhea




  • Confusion, seizures, or coma




The virus tends to aggressively target the lungs, often leading to pneumonia or acute respiratory distress syndrome (ARDS).




Incubation Period & Risk Window


Symptoms may appear 2 to 8 days after exposure. Anyone who has recently interacted with birds or visited live poultry markets should be vigilant, even if initial symptoms are mild.