Members making raw-milk cheese have been fielding questions from customers and from each other about a study that keeps resurfacing in dairy trade coverage: does aging a raw-milk wheel for 60 days actually clear highly pathogenic avian influenza, or is that assumption doing more work than the evidence supports? The study behind those questions is real, it's been through peer review, and it's worth understanding clearly rather than repeating secondhand.
Researchers built a mini cheese model using raw milk spiked with the virus, aged it under different acidity conditions, and tracked how long infectious virus survived. At the higher pH levels common in many cheese styles, infectious virus persisted through the make and for up to 120 days of aging — well past the 60-day mark the federal rule treats as sufficient. At the lowest pH tested, the virus didn't survive the cheesemaking process at all. The researchers' own conclusion was blunt: the current 60-day aging requirement, on its own, doesn't reliably guarantee the virus is inactivated.
What this does and doesn't mean
This is not a finding that raw-milk cheese made under current rules is broadly unsafe, and it is not a call for members to change their process overnight. It's a data point that changes the terms of a rulemaking conversation the federal food-safety regulator was already having about whether time-based aging is the right proxy for pathogen reduction, or whether measurable factors like acidity deserve more weight than a single duration requirement. The researchers themselves pointed toward acidification, bulk-tank testing, or thermization as possible additional safeguards, not toward abandoning aging entirely.
For members making raw-milk cheese right now, the practical takeaway is narrower than the headlines suggest. If your process already tracks and documents pH through the make and the aging period — which anyone with a HACCP plan should already be doing — you have exactly the kind of information a regulator reviewing this data would want to see. If you've been treating the 60-day mark as the only control point that matters, this is a reasonable moment to check whether your documentation shows the acidity curve behind it, not just the calendar.
What the federation is doing
The Food Safety Committee has added this study to the material it's tracking ahead of any formal comment period on aging-rule criteria, and we'll notify members directly if a comment window opens rather than relying on members to catch it in the federal register on their own. In the meantime, two things are worth doing now: review your own pH documentation for raw-milk products against what your food safety plan actually requires you to record, and flag any gaps to your quality lead before a regulator asks about them instead of before you decide to look.
This is exactly the kind of development that rewards members who show up for advocacy work between the loud news cycles, not just when a headline forces the issue. If you want to be part of the group that reviews language before it becomes a public comment, the Food Safety Committee takes new members on a rolling basis — reach out and ask what the current workload looks like before you commit to more than you have time for this spring.
The International Cheese Federation (ICF) and More Cheese are entirely fictional. This post is demonstration content created for MemberJunction. All people, organizations, events, courses, certifications, figures, and quotations in it are invented, and nothing here represents a real association, a real business, a real person, or real professional advice.