First US Child Diagnosed with H5N1 Bird Flu: What You Necessitate to Know

The Centers for Disease Control and Prevention (CDC) has confirmed the first case of avian influenza A(H5N1) – commonly known as bird flu – in a child in the United States. This case, detected in California, raises concerns but health officials emphasize the overall risk to the public remains low. Here’s a breakdown of what we know.

What Happened?

On November 22, 2024, the CDC confirmed a human infection with the H5N1 virus in a child residing in California . The child experienced mild symptoms and was treated with antiviral medications. Initial testing revealed low levels of the virus, and subsequent testing days later was negative for H5 bird flu but positive for other common respiratory viruses. The child is currently recovering.

Investigation and Spread

The California Department of Public Health (CDPH) is investigating the source of the child’s infection. Household members were also evaluated; all tested negative for H5N1, though some were positive for the same common respiratory viruses as the child. Contact tracing is ongoing, but currently, there is no evidence of person-to-person spread . To date, no person-to-person spread has been identified in any of the H5N1 cases reported in the U.S.

Current Situation in the US

As of February 18, 2026, a total of 71 human cases of H5 bird flu have been reported in the United States since February 2024, with 29 cases occurring in California . The CDC is closely monitoring the situation, particularly in states experiencing outbreaks in animals, including California, where H5N1 has been detected in wild birds, domestic poultry since 2022, and dairy herds since August 2024.

Risk Assessment

The CDC currently assesses the risk to the general public as low . However, individuals with exposure to infected or potentially infected animals – including birds, dairy cattle, and other livestock – or environments contaminated by these animals are at higher risk. The CDC recommends avoiding unprotected contact with sick or dead animals.

What is H5N1?

H5N1 is a strain of the influenza A virus that primarily affects birds. Although it rarely infects humans, when it does, it can cause severe illness. Sporadic human infections with H5N1, where animal exposure isn’t identified, are uncommon but have been reported in other countries .

Monitoring and Reporting

The CDC is using its influenza surveillance systems to monitor for H5N1 activity in people. Data on the number of people monitored and tested for bird flu are available monthly . USDA data on highly pathogenic avian influenza (HPAI) detections in animals is now available on the USDA’s website, as the CDC no longer reports this data .

Staying Informed

The CDC will continue to provide updates as more information becomes available. For California-specific updates on livestock, visit the California Department of Food and Agriculture (CDFA) website . For poultry updates, also check the CDFA website .