Facing reluctance from farms to test workers and animals, scientists turn to experimental studies to understand how H5N1 bird flu is spreading through cows and farms.
The risk to people from H5N1 is low currently, but the virus's mutation could increase this risk, making continued circulation a significant concern.
Gaps in testing hinder understanding of virus transmission; inadequate testing delays identifying transmission patterns crucial for containment.
Challenges in testing are highlighted by the first documented case of mammal-to-human H5N1 transmission in a dairy worker, where further testing limitations impede understanding of spread.
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