Two little-known animal viruses—Influenza D, common in cattle, and a dog coronavirus called CCoV‑HuPn‑2018—deserve a closer look in 2026 and beyond, according to infectious disease specialists. While neither is currently causing widespread illness, emerging research suggests both have the potential to adapt to humans, prompting calls for increased surveillance and diagnostic development.
A Quite Threat? Why Scientists Are Watching Two Emerging Viruses
understanding how viruses jump species—and spotting those jumps early—is crucial for preventing future outbreaks, even if those outbreaks never materialize.
- Influenza D, a relative of the seasonal flu, has shown the ability to spread through the air in lab settings.
- A dog coronavirus, CCoV‑HuPn‑2018, has been identified in human cases in Malaysia and Haiti, but doesn’t yet easily infect human cells.
- Increased testing and surveillance are needed to monitor these viruses and understand their potential for spillover.
- Currently, there’s no evidence of widespread human illness from either virus.
The world is still reeling from the COVID-19 pandemic, and the last thing anyone wants to hear is “another potential threat.” But public health experts aren’t sounding the alarm just yet. instead, a viewpoint published in January 2026 in the CDC’s Emerging Infectious Diseases journal, and echoed by University of Florida researchers, urges proactive monitoring of Influenza D and CCoV‑HuPn‑2018. The message is clear: watch these viruses, build better tests, and avoid unnecessary hype.
Influenza D: A Cattle Virus with Potential
Influenza D is a flu virus that primarily affects cattle, though it’s not known to cause severe illness in them. It’s a cousin of the more familiar Influenza C,but uses a different surface protein—called HEF—to enter cells. Cattle are the main reservoir for the virus, but it can infect a wide range of other animals.
So, should people be worried? Exposure is common, notably among those who work closely with cattle. Studies have found past exposure in up to 94–97% of cattle workers in Florida, and Influenza D genetic material was detected in nasal washes from two-thirds of US dairy workers during a single week, according to data from
However, researchers emphasize that influenza D is not yet adapted for efficient human-to-human spread. The sensible response is enhanced surveillance and better tests, not alarm.
Public health officials recommend adding Influenza D to testing panels at the animal-human interface (abattoirs, dairies, veterinary settings) and developing PCR tests for CCoV‑HuPn‑2018 in regions where it’s likeliest to appear. These proactive measures are a routine part of preventing surprises.
When it comes to these emerging viruses,clear communication is key. It’s vital to emphasize that exposure doesn’t equal disease for Influenza D and to avoid implying a human disease burden without evidence. Reporting exposure honestly and explaining the value of testing can help keep risk low.
