Reviewing the literature on Influenza A in cattle, I see that until 2024, it was regarded as extremely rare. Documented cases of natural influenza A infections in cattle are presented on the following graph, published in a 2019 paper titled “Influenza A in Bovine Species: A Narrative Literature Review” in the journal Virus.

Strangely enough, I cannot find a single serious investigative report – conducted by large animal veterinarians – that attempts to answer how and why this particular virus (classified as HPAI H5N1 clade 2.3.4.4b) has so dramatically expanded its host range into bovine animals with lethal effect.

Because no one else in the country has attempted to address this question, we at the McCullough Foundation – that is, Dr. Peter McCullough, John Leake, and Nicholas Hulscher – decided to look into it. The following is our brief documentary film about this subject: