Without mandatory testing, bird flu will continue circulating at farms
Twice in as many weeks, California health officials have called consumers away from raw milk produced by a Fresno dairy, after routine laboratory testing detected bird flu virus in successive product lots. No human illness has been traced to the contaminated milk, yet the episode arrives against a backdrop of 55 human bird flu infections nationwide in 2024 — a quiet reminder that the boundary between animal disease and human vulnerability is never as fixed as we might wish. At stake is not only the safety of an unpasteurized product whose risks are well-documented, but the larger question of whether voluntary testing and individual caution can hold a line that many scientists believe only mandatory, systemic surveillance can truly defend.
- A Fresno dairy has now recalled two consecutive lots of raw milk within seven days after state lab testing detected live bird flu virus in retail samples.
- Raw milk's lack of pasteurization leaves it capable of carrying a range of dangerous pathogens — and bird flu's presence in the supply chain raises the stakes far beyond typical food-safety concerns.
- Raw Farm insists its own testing and state agriculture results came back negative, creating a contested evidentiary picture even as officials urge consumers to return products immediately.
- Bird flu has already reached 55 Americans in 2024, including a child in California, and scientists warn the virus could mutate toward human-to-human transmission if circulation in farm animals goes unchecked.
- A former FDA commissioner is pressing for mandatory bulk testing of dairy farms, arguing that voluntary measures leave a dangerous blind spot in the nation's ability to detect and contain the virus.
California health officials this week issued their second recall in seven days against raw milk from Raw Farm, a Fresno-based dairy, after bird flu virus was detected in lot 20241119 — a batch with a best-before date of December 7, 2024. The announcement followed an identical action the previous week targeting lot 20241109. Both detections emerged from routine retail testing conducted by the Santa Clara County Public Health Laboratory. No human cases of bird flu have been linked to the milk so far, but state officials urged consumers to return any affected products without delay.
The recalls have renewed attention to the particular dangers of unpasteurized milk. Without the heating process that eliminates harmful pathogens, raw milk can carry listeria, salmonella, campylobacter, and E. coli — organisms tied historically to miscarriages, stillbirths, kidney failure, and death. The FDA has found no credible evidence that raw milk confers the health benefits its advocates claim, and federal law bars its sale across state lines. Raw Farm, for its part, maintains that its own laboratory results and testing by the California Department of Food and Agriculture returned negative findings, though the state has collected additional samples whose results remain pending.
The recalls unfold within a widening national crisis. Bird flu has infected 55 people in the United States in 2024, with 29 cases in California alone — most of them farm workers in close contact with sick animals. The CDC recently confirmed the virus in a California child, with the exposure source still under investigation. No human-to-human transmission has been documented, but the concern is that continued circulation of the virus in dairy and poultry populations increases the probability of a mutation that could change that picture.
Interest in raw milk has climbed during the outbreak, amplified by prominent advocates including Robert F. Kennedy Jr., nominated by President-elect Trump to lead the Department of Health and Human Services. Against that cultural current, former FDA Commissioner Dr. David Kessler argued this week that mandatory bulk testing of dairy farms is the only reliable way to map the virus's spread and reduce the risk of a more dangerous mutation taking hold. State investigators continue to examine the connections between retail contamination and the broader movement of bird flu through cattle, poultry, and human populations, with further test results expected in the days ahead.
California health officials issued a second warning this week against consuming raw milk from Raw Farm, a Fresno-based dairy, after detecting bird flu virus in another product batch. The state announced the recall on Wednesday, urging consumers to return any remaining milk from lot code 20241119, which carries a best-before date of December 7, 2024. This marks the second such recall in as many weeks—just seven days earlier, the same producer had pulled quart and half-gallon containers with lot ID 20241109 from shelves after similar testing revealed the virus.
The detections came as the Santa Clara County Public Health Laboratory was conducting routine testing of raw milk products available in retail stores. State health officials emphasized that no human cases of bird flu linked to the contaminated milk have surfaced so far, but they stressed the seriousness of the situation. "Consumers are strongly urged to not consume any of the affected raw milk," the California Department of Public Health stated, instructing customers to return products immediately to where they purchased them.
Raw milk, by definition, has not undergone pasteurization—the heating process that kills harmful bacteria and pathogens. This distinction matters considerably. Unpasteurized milk can harbor listeria, campylobacter, salmonella, and E. coli, pathogens that have triggered serious outbreaks in the past. Public health records document cases where raw milk consumption led to miscarriages, stillbirths, kidney failure, and deaths. The FDA has found no scientific evidence that raw milk offers health benefits for illness or allergies, and federal law prohibits its sale across state lines.
Raw Farm has maintained that its products undergo rigorous testing and that results from both its own laboratory work and official testing by the California Department of Food and Agriculture have returned negative results. The company released a statement to this effect on November 24. However, the state has now collected additional samples of both bulk tank milk and bottled products directly from Raw Farm, with results still pending as of the Wednesday announcement.
The timing of these recalls reflects a broader public health concern. Bird flu has spread steadily through wild bird populations, poultry flocks, and dairy cattle herds across the United States since spring. The virus has infected 55 people in 2024, with 29 cases occurring in California alone. Most infections have involved farm workers with direct contact to sick animals, though the CDC recently confirmed the first case in a child in the state—an exposure source still under investigation. Scientists have detected no evidence of person-to-person transmission so far, but researchers worry the virus could mutate in ways that enable human-to-human spread.
Interest in raw milk has surged during the bird flu outbreak, fueled partly by high-profile advocates including Robert F. Kennedy Jr., whom President-elect Donald Trump has nominated to lead the Department of Health and Human Services. Kennedy has publicly stated he drinks raw milk. In June, the FDA urged states to issue stronger public warnings about raw milk dangers and to use their regulatory authority to prevent sales in areas where dairy herds have tested positive for H5N1.
Dr. David Kessler, a former FDA commissioner and architect of Operation Warp Speed, wrote this week that mandatory bulk testing of milk in states with dairy farms is essential to understand the full scope of infection and contain the virus. "Without mandatory testing, bird flu will continue circulating at farms across the country, which substantially increases the risk that the virus mutates and evolves to allow human-to-human transmission that will be hard to stop," he argued. The state's ongoing investigation into the link between retail raw milk contamination and the broader spread of bird flu among cattle, poultry, and humans remains active, with more test results expected in the coming days.
Notable Quotes
Consumers are strongly urged to not consume any of the affected raw milk.— California Department of Public Health
Without mandatory testing, bird flu will continue circulating at farms across the country, which substantially increases the risk that the virus mutates and evolves to allow human-to-human transmission that will be hard to stop.— Dr. David Kessler, former FDA commissioner
The Hearth Conversation Another angle on the story
Why does raw milk keep testing positive when the producer says their testing comes back clean?
The company tests their own products, but independent state laboratories are finding the virus. It suggests either the virus is present in ways their testing doesn't catch, or it's entering the product after their testing occurs—possibly during handling or storage.
Is there any actual danger to people who drank this milk?
Not yet. No human cases have been linked to these specific batches. But the concern is real because raw milk can carry serious pathogens, and bird flu is spreading through dairy herds. The state is being precautionary.
Why are people drinking raw milk at all if it's this risky?
Some believe it has health benefits the science doesn't support. Others distrust pasteurization. And now there's a cultural moment around it—prominent figures like Kennedy are vocal advocates, which gives it credibility it might not otherwise have.
What's the real worry underneath all this?
That bird flu could mutate while circulating in dairy herds and milk supplies. If it learns to spread person-to-person, we could have a much larger outbreak. Mandatory testing of farms would help catch that before it happens.
So this recall is about prevention, not response to actual harm?
Exactly. It's a warning system. The state is trying to stop the virus from spreading further while they investigate how it got into the milk in the first place.