JONATHAN M. METSCH, Dr.P.H. – Tracking Emerging Public Health Challenges – April 4, 2026 – Bird Flu
As an influenza virologist, I can explain what this means and why I am not particularly worried by it – yet.
What do we know about this case?
The patient was infected outside of Europe before traveling to the Lombardy region of northern Italy. Lombardy’s welfare councilor Guido Bertolaso has reported that the patient is a boy with underlying health conditions who was diagnosed after returning from a visit to Africa.
Fortunately, his infection hasn’t made him seriously unwell, but he has been placed in hospital isolation in the San Gerardo hospital in Monza. Italian public health authorities diagnosed H9N2 influenza virus infection using laboratory tests that detect the virus’s genetic material.” (1)
“The first human case of H9N2 influenza virus, a type of bird flu, has been reported in Europe.
The Italian Ministry of Health recorded the infection on 25 March, involving a boy with underlying health conditions who had travelled from Africa.
The patient is currently in hospital isolation in Monza, Italy, but his infection has not caused serious illness.” (1)
First human case of H9N2 bird flu recorded in Europe. Here’s what we know, Ed Hutchinson. https://www.independent.co.uk/news/world/europe/bird-flu-virus-h9n2-europe-case-b2948558.html
“The Cambodia Ministry of Health reports an additional human H5N1 avian influenza (bird flu) case in a 3-year-old boy from Tumnup Thmey village, Beng commune, Banteay Ampil district, Oddar Meanchey province.
The patient has been isolated in hospital and is receiving intensive medical care.
Upon investigation, it was revealed that the patient’s home has chickens and ducks, including some sick and dead chickens, which the child had played around.” (2)
“At this point, avian flu H5N1 is thought to have very limited ability to transmit between humans, but a recent case in British Columbia with an unknown source of transmission has piqued the curiosity and concern of scientists, including York University Professor Seyed Moghadas. Did this lone case come about through transmission from an animal or another person, and if it was via human transmission, what methods would control its spread in the human population?
Director of York’s Agent-Based Modeling Laboratory in the Center of Excellence in AI for Public Health Advancement, Moghadas and a group of researchers used modeling to understand the best spread control measures should human-to-human transmission become possible.
“The idea was, let’s evaluate some of the interventions that we usually implement at the very earliest stage of a disease outbreak or emerging disease, which we know very little about,” he says.
For the research, “Containment Scenarios for Post-Spillover Transmission Chains of Avian Influenza H5N1 from Poultry to Humans,” published in Nature Health, various scenarios from isolation to vaccination before or after a spillover event were modeled.
It is one of only a few studies that have explicitly modeled outbreak dynamics following spillover into humans or the effectiveness of public health interventions in early and highly uncertain phases of virus development.” (3)
“Bird flu has flown off the national news radar, with only scattered, local reports of dead birds in parks and poultry farms. Is it simply no longer a concern, or have cuts to federal science funding disrupted monitoring for this disease? Airborne pathogens expert Seema Lakdawala gives a flyover view on where bird flu stands today, and whether the government’s current monitoring efforts are enough to help prevent another pandemic.” (4)
More than 1,100 geese just turned up dead or sick in N.J. Here’s the disturbing reason why., https://www.nj.com/healthfit/2026/02/more-than-1100-geese-just-turned-up-dead-or-sick-in-nj-heres-the-disturbing-reason-why.html
1.What we know about Europe’s first human case of H9N2 bird flu, by Ed Hutchinson, https://www.independent.co.uk/bulletin/news/bird-flu-virus-h9n2-europe-b2948618.html
2.Cambodia reports 3rd H5N1 avian influenza case of the year, by Robert Herriman, https://outbreaknewstoday.substack.com/p/cambodia-reports-3rd-h5n1-avian-influenza
3.How to contain avian flu H5N1 if human-to-human spread begins, by Sandra McLean, https://medicalxpress.com/news/2026-03-avian-flu-h5n1-human.html
4.Could bird flu still spark a pandemic?, https://www.unmc.edu/healthsecurity/transmission/2026/03/25/could-bird-flu-still-spark-a-pandemic/
curated by Jonathan M. Metsch, Dr.P.H.
Clinical Professor of Environmental Medicine, Icahn School of Medicine at Mount Sinai