WHO reports H5N1 death among variant zoonotic flu cases seen this year

Global Flu Watch: New Cases of Avian and Swine Influenza Raise Concerns

The World Health Organization (WHO) is tracking a cluster of avian and swine influenza cases in people, including a recent fatal H5N1 infection in Bangladesh. As of the first quarter of 2026, 13 cases have been identified, prompting increased surveillance and analysis of potential trends.

H5N1: A Resurgent Threat?

A previously unreported case of H5N1 avian influenza resulted in the death of a child in Bangladesh. The WHO was notified on February 9, 2026, after the patient, who had no underlying health conditions, began experiencing symptoms on January 21 and was hospitalized on January 28, ultimately succumbing to the illness on February 1. The virus detected in the patient was genetically similar to strains circulating in local poultry populations since around 2011. This marks the first H5N1 case reported in Bangladesh in 2026, following four cases recorded in the previous year.

Three additional H5N1 cases were reported in Cambodia during the same period. The WHO notes that exposure to household poultry, specifically ducks and chickens that died shortly before the onset of illness, was a factor in the Bangladeshi case.

Beyond H5N1: Diverse Influenza Strains Detected

The WHO’s surveillance extends beyond H5N1. Four human cases of influenza A(H9N2) have been identified in China, with one case reported in Italy. All identified cases of influenza A(H10N3), influenza A(H1N1) variant ((H1N1)v), influenza A(H1N2)v, and influenza A(H3N2)v have been reported in China.

Children Particularly Vulnerable

A concerning trend is the disproportionate impact on children. Two of the H9N2 cases, both originating in China, occurred in children under the age of five. All three swine flu variant cases also involved children. Two Chinese cases involved contact with pigs, while a case identified in Brazil in September 2025 – previously unreported – involved a student at an agricultural school raising pigs and laying hens. Notably, the Brazilian patient reported no direct contact with sick animals.

Risk Assessment: Low, But Vigilance is Key

Despite these new cases, the WHO maintains that the overall risk to the general population remains low. Crucially, no illnesses have been reported among close contacts of the 13 identified case-patients. The organization emphasizes that sustained human-to-human transmission has not been observed in connection with these cases.

“Sustained human to human transmission has not been reported associated with the above-mentioned human infection events,” the WHO stated in its report.

Pro Tip: Practice Good Hygiene

Regardless of the overall risk level, practicing good hygiene is always a smart move. Frequent handwashing, avoiding close contact with sick individuals, and thoroughly cooking poultry and pork can help minimize your risk of infection.

FAQ: Influenza at the Human-Animal Interface

Q: What is avian influenza?
A: Avian influenza, commonly known as bird flu, is a type of influenza that primarily infects birds but can occasionally infect humans.

Q: How do humans contract avian influenza?
A: Human infections typically occur through direct contact with infected poultry or contaminated environments.

Q: Is H5N1 highly contagious among humans?
A: Currently, H5N1 does not transmit easily from person to person.

Q: What are the symptoms of avian influenza in humans?
A: Symptoms can range from mild (like a common cold) to severe (like pneumonia), and can even be fatal.

Did you know?

The first human cases of H5N1 avian influenza were reported in 1997, originating in Hong Kong.

For more information on influenza and related health threats, visit the WHO’s avian influenza page.

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