The first case of bird flu in a human in Ohio has been reported, according to officials. A farm worker from Mercer County, Ohio, located on the state's western border along Indiana, came into contact with deceased poultry that was infected with the virus, the Ohio Department of Health announced on Wednesday.

Two cats that belonged to Michigan dairy workers exposed to bird flu died after being infected with the virus last year

But the study, whose publication was delayed by a pause in public communications by the agency, leaves key questions unanswered.