“We anticipate that this will continue and get worse over the next few years,” said Dr. Jim Casey, associate professor of virology at Cornell University. “We fear there may be more widespread presence of the virus.”One of Dr. Casey’s colleagues researching the virus, Dr. Paul Bowser, a professor of aquatic animal medicine, added, “This is a new pathogen and for the first number of years — 4, 5 or 10 years — things are going to be pretty rough, then the animals will become more immune and resistant and the mortalities will decline.”