While the H5N1 bird flu keep spreading, there has been for the first time ever a reported H5N9 outbreak in the United States. This occurred on a duck farm in California

A California duck farm made headlines this week after the World Organization of Animal Health published a report by U.S. authorities that a strain of bird flu that scientists call H5N9 had been found among sick birds in the flock.

A pandemic is not inevitable, scientists say. But the outbreak has passed worrisome milestones in recent weeks, including cattle that may have been reinfected.

A newly identified strain of bird flu, H5N9, discovered at a California duck farm, has prompted concerns about the possibility of a larger outbreak, The Washington Post reported Jan. 29. Health experts are monitoring the situation, particularly the potential for genetic mutations that could make the virus more easily transmissible among humans.

H5N1, or bird flu, poses a limited risk to humans but remains a serious threat. Learn how it spreads, its symptoms, and key precautions to prevent infection.

H5N9 is a rare subtype of the influenza A virus that can cause highly pathogenic avian influenza (HPAI), also known as bird flu. It's a reassortment strain that originated from the H5N1, H7N9, and H9N2 subtypes.

The Centers for Disease Control and Prevention are monitoring the bird flu situation in the United States. Here's what to know and how to stay safe.

The CDC announced on Thursday its recommendation to test hospitalized influenza A patients more quickly and thoroughly to distinguish between seasonal flu and bird flu.

H5N1 first human death was reported in USA. Since then, health authorities have been monitoring and cases and shave sounded alarm regarding its mutation rate.

US officials are investigating the appearance of a strain of bird flu identified in the US for the first time, a worrying sign that the virus is evolving in ways that could make it harder to

H5N1 bird flu hits Georgia’s poultry industry marking the first commercial outbreak in the state Learn CDC prevention tips to protect public health and livelihoods

The H5N9 strain of avian influenza is much more rare than the H5N1 which has been responsible for most of the reported human cases and the first human death.