H5N1 Bird Flu Spreads in Cambodia and US: WHO Confirms New Cases, Experts Monitor Transmission Risks

Bird Flu Bulletin: Daily H5N1 Update – Wednesday, July 16, 2025 Welcome to Bird Flu Bulletin: Daily H5N1 Update. Today is Wednesday, July 16, 2025. Here are the top developments from the last 24 hours. Top Stories First, the World Health Organization has confirmed the latest human case of H5N1 avian influenza in Bangladesh this July, highlighting the continuing global spread of the virus. Recent weeks have seen ongoing transmission among both poultry and wild bird populations, with persistent cases documented across Asia, Europe, and North America. Second, Cambodia remains a focus, as WHO has reported an unusual surge in human infections this summer. Eleven laboratory-confirmed cases were notified in Cambodia since January, with seven in June alone. This represents one of the highest monthly upticks in recent years, signaling increased exposure risk, especially in rural areas where contact with poultry is common. Third, in the United States, the Centers for Disease Control and Prevention reports that several recent human cases have occurred among farm and poultry workers. While the CDC maintains that the public risk remains low, the agency has streamlined its reporting to provide monthly human case numbers, reflecting the ongoing but relatively contained pattern of transmission. The USDA continues to monitor animal outbreaks, particularly in dairy cows and poultry operations. Case Numbers Compared to yesterday, the number of reported human H5N1 cases globally remained stable, with no major jumps in new infections. In Cambodia, the total for July stands at 11 laboratory-confirmed human cases for the year so far, with no new deaths reported overnight. According to global statistics maintained by Hong Kong’s Centre for Health Protection and the CDC, there have been no significant changes in case distribution or overall trends since last week. Health Authority Guidance Today, the CDC reiterated that while the H5N1 virus is widespread in wild birds and poultry, the threat to the general public remains low. Authorities continue to advise people working with poultry or exposed to infected wild birds to use personal protective equipment. WHO advises member countries to enhance surveillance and rapid reporting of both human and animal infections, and to continue educating rural populations about the risks of direct contact with sick or dead birds. Expert Interview Snippet We spoke with Dr. Amina Patel, virologist and advisor to global pandemic response teams, about the recent trends. Dr. Patel: "The uptick in Cambodian cases is a concern but remains localized. Genetic sequencing shows no significant mutations that would suggest increased human-to-human transmission. Most cases are still associated with direct poultry exposure." Looking Ahead Tomorrow, health officials in Southeast Asia are expected to release updated case numbers and findings from recent field investigations in Cambodia and Vietnam. In the U.S., CDC is preparing its monthly This content was created in partnership and with the help of Artificial Intelligence AI.