Fresh pandemic in US? New virus spreads in all 50 states amid ‘human transmission’ concerns

Health officials and Global Virus Networks have raised alarms as the H5N1 avian influenza virus continues to spread rapidly across dairy farms in the United States since March 2024. The outbreak has also infected humans with more than 70 human infections and at least one confirmed death, as per reports.

All 50 American states are reportedly facing an outbreak of the H5N1 bird flu virus and experts have sounded an alarm over the possibility of a fresh pandemic in the US.

Here are ten things you need to know about H5N1 avian influenza virus :

-The United States is currently grappling with an outbreak of the H5N1 avian flu virus rapidly as it propagates throughout US dairy farms. The H5N1 virus is already leading to human infections, and experts are warning about the possibility of a fresh pandemic in the United States.


-As of now, more than 70 human infections have been reported nationwide, with at least one confirmed death. The fatality occurred in January 2025 in Louisiana, where a 65-year-old man with underlying health conditions died after being hospitalized with severe respiratory symptoms.

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-The continued presence of the virus in mammals suggests it could evolve to enable human-to-human transmission, according to the Global Virus Network (GVN). The organization emphasizes the urgent need for enhanced surveillance, consistent testing protocols, and vaccination efforts targeting both farmworkers and animals.

-"Understanding the current landscape of H5N1 infections is critical for effective prevention and response," said Sten H Vermund, MD, PhD, chief medical officer of the GVN and dean of the USF Health College of Public Health at the University of South Florida, USA. "The virus' ability to infect both animals and humans, combined with recent genetic changes, underscores the importance of proactive surveillance and rapid response measures."

-Avian influenza A (H5N1) is a subtype of influenza virus that infects birds, and mammals and can also infect humans. According to the World Health Organization, infections in humans can cause severe disease with a high mortality rate.

-Most human cases identified so far have been associated with direct contact with infected birds, animals, or contaminated environments. The virus does not appear to spread easily between people, and there have been no confirmed instances of sustained human-to-human transmission.

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-The US Centers for Disease Control and Prevention (CDC) has assessed the overall risk to the general population as low. However, they urge caution for individuals working in close contact with potentially infected animals, particularly in dairy and poultry industries. The CDC continues to monitor exposed individuals closely and encourages adherence to safety protocols.

-H5N1 is a highly contagious respiratory virus that can lead to a spectrum of illnesses in humans, ranging from mild symptoms to severe, and potentially fatal, cases. Common symptoms include high fever, fatigue, cough, sore throat, and muscle pain. In some instances, individuals may also develop conjunctivitis or other non-respiratory symptoms.

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-Sten H Vermund, MD, PhD, dean of the USF Health College of Public Health at the University of South Florida, USA, stated that “Understanding the current landscape of H5N1 infections is critical for effective prevention and response.” Citing the virus's capacity to infect both humans and animals, the expert said that proactive surveillance and quick reaction strategies are crucial.

-According to the CDC, the outbreak poses minimal risk to the general public. However, they stress the importance of preventive measures, especially for individuals in close contact with infected animals