The authors state twice in the article that they cannot tell if it was aerosolized, airborne, or if the pigs were coughing and spitting! The monkeys' cages were placed 8 inches away from the pigs - I think a lot of us on here have fish longer than that! Also, the monkeys stayed there 24/7, 8 inches away from coughing animals (which the article also points out are bigger shedding and aerosol producers than any other mammal), for a week before falling ill. Air samplers situated 2 feet away from the pigs ran for 30 minutes, and recovered no virus particles. Yes, it is non-direct transmission, but you cannot conclude that it is airborne, either.
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