Middle East respiratory syndrome coronavirus (MERS-CoV) has been chased from the headlines by other viruses, but with a fatality rate of around 30 percent and the potential ability to spread from person to person, it remains a threat to global heath in the eyes of the World Health Organization. Now, researchers from the Navy Medical Research Center have reported using transchromosomal cows to generate polyclonal antibodies that could rapidly reduce the viral load in the lungs of MERS-CoV-infected mice.