A relatively obscure influenza virus, known as influenza D, is gaining attention from public health officials as it spreads among livestock populations globally. Whereas it hasn’t yet caused widespread illness in humans, scientists are increasingly concerned about its potential to evolve and trigger future outbreaks, echoing the early warnings seen with influenza A and coronaviruses. The virus, first identified in 2011, is currently causing respiratory issues in pigs and cattle, and researchers are working to understand the risk it poses to human health.
The concern isn’t simply about a new animal virus jumping to humans. Influenza D exhibits characteristics that suggest it’s “primed for rapid evolution,” according to researchers at the University of Florida. This means the virus could potentially mutate to become more easily transmissible between people, potentially leading to epidemics or even pandemics. Currently, most people lack immunity to influenza D, making the population particularly vulnerable should the virus gain the ability to spread efficiently among humans. The lack of widespread surveillance and diagnostic tools for influenza D further complicates the situation, hindering efforts to track its spread and assess the true extent of the threat.
Influenza D: A Growing Threat to Livestock and Potential Human Risk
Influenza D virus has been primarily associated with infections in pigs and cows, but it has also been detected in a variety of other livestock and wild animal species, including poultry, deer, giraffes, and kangaroos. The virus is believed to contribute to bovine respiratory disease, a significant economic burden for the U.S. Cattle industry, costing an estimated $1 billion annually. Studies have shown that a high percentage of cattle workers – up to 97% in Colorado and Florida – carry antibodies against influenza D, indicating prior exposure to the virus. However, these infections have so far been “subclinical,” meaning they haven’t caused noticeable symptoms of illness in those exposed.
Researchers, including those at the University of Texas and the University of Florida, have been sounding the alarm about influenza D alongside another emerging pathogen: canine coronavirus HuPn-2018. A review published in the January 2026 issue of Emerging Infectious Diseases, a journal of the Centers for Disease Control and Prevention, highlights the potential of both viruses to cause future human epidemics, but notes the critical lack of diagnostics and surveillance. The CDC report emphasizes the demand for increased monitoring and research to better understand these emerging threats.
Canine Coronavirus: Another Virus on the Radar
While influenza D is garnering attention for its potential to evolve and cause respiratory illness, canine coronavirus HuPn-2018 also presents a potential risk. Like influenza D, this virus has animal origins and the capacity to cause respiratory problems. The combination of these two emerging viruses, coupled with the existing challenges of monitoring and responding to novel pathogens, raises concerns among infectious disease experts. Scientists are particularly worried about the possibility of these viruses evolving to facilitate human-to-human transmission, a key factor in the emergence of pandemics.
The current lack of widespread testing and monitoring for both influenza D and canine coronavirus makes it difficult to assess the true extent of their spread and potential impact. Improved surveillance systems and the development of rapid diagnostic tests are crucial steps in preparing for potential outbreaks. As Newsweek reported, researchers emphasize the importance of learning from past pandemics and proactively addressing these emerging threats before they escalate.
The situation underscores the ongoing need for vigilance in monitoring animal populations for novel viruses and investing in research to understand their potential to spill over into humans. While influenza D and canine coronavirus haven’t yet caused widespread human illness, their potential for evolution and the lack of existing immunity in the population warrant continued attention and proactive public health measures. The next steps involve expanding surveillance efforts, developing diagnostic tools, and conducting further research to assess the risks and inform potential interventions.
What does this imply for the future of public health? Continued monitoring of these viruses and investment in preventative measures will be crucial. Share your thoughts in the comments below, and facilitate spread awareness about these emerging threats.
Disclaimer: This article provides informational content about health topics and is not intended to be a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of a qualified healthcare provider for any questions you may have regarding a medical condition.
