CDC data reveals potential undetected spread of avian influenza in cattle and veterinarians, prompting calls for expanded surveillance.
The concern about this virus spreading to humans is becoming more real by the day.
At a Glance
- CDC report suggests undetected spread of bird flu in cows and people
- Three out of 150 cow veterinarians had bird flu antibodies without symptoms
- Systematic surveillance recommended for dairy cattle, milk, and exposed humans
- Bird flu has infected nearly 70 individuals in the U.S. since April 2024
- Current risk to the general public remains low, according to CDC
Undetected Spread of Avian Influenza
The Centers for Disease Control and Prevention (CDC) has released alarming data suggesting that highly pathogenic avian influenza may have spread undetected in cows and people.
So it might already be spreading among us.
This revelation comes as a surprise to many, as the virus was previously thought to be contained within specific areas. The findings raise concerns about the potential for wider transmission and underscore the need for increased vigilance in monitoring and controlling the spread of bird flu.
A study conducted by the CDC found that three out of 150 cow veterinarians tested positive for antibodies against bird flu, indicating they had been infected without showing symptoms. What’s particularly troubling is that two of these veterinarians had not been exposed to sick animals, and one was not even in a state where bird flu had been detected in cattle. This suggests that the virus may have a broader reach than initially believed.
CDC confirmed a 2nd H5 bird #flu human infection in the U.S. associated with exposure to infected dairy cows. Based on information so far, CDC believes risk to the public continues to be low, but people with exposure to infected animals are at higher risk: https://t.co/H765EvEyAq pic.twitter.com/fd0HUd93nt
— CDC Flu (@CDCFlu) May 22, 2024
In light of these findings, the CDC is recommending systematic surveillance for bird flu in dairy cattle, milk, and humans who are exposed to cattle. This proactive approach aims to ensure appropriate hazard assessments and prevent further spread of the virus. The agency emphasizes the importance of rapid identification to protect both animal and human health.
“These findings suggest the possible benefit of systematic surveillance for rapid identification of [the bird flu] virus in dairy cattle, milk, and humans who are exposed to cattle to ensure appropriate hazard assessments,” the CDC said in a statement.
While the current risk to the general public remains low, the bird flu outbreak has had severe consequences for the poultry industry. Millions of chickens have been culled in an effort to contain the virus, leading to a significant spike in egg prices. In January 2025, egg prices reached a record high of $4.95 per carton, prompting some retailers to limit purchases.
Since April 2024, nearly 70 individuals in the United States have been infected with bird flu. Tragically, one death has been reported – a man over 65 with preexisting health issues in Louisiana. In Ohio, a farmworker likely contracted the virus from deceased poultry, though details about their symptoms were not provided. These cases highlight the potential for human transmission, particularly among those in close contact with infected animals.
There are growing concerns about potential underreporting of cases due to farmers’ and workers’ fears of income loss and missed work. This reluctance to report symptoms or potential exposure could hinder efforts to accurately track and contain the virus. As a precautionary measure, California declared a State of Emergency over bird flu last year, demonstrating the seriousness with which some states are approaching this threat.
This is getting worrying…
