Eek— that’s gross! New Yorkers can get hantavirus from rats scurrying around the city — but only if you’re doing something extremely repulsive, an infectious disease expert warned Friday.  “ Pizza Rat is not going to give this to you unless you’re eating its poop and licking its urine,” Dr. Ulysses Wu of Hartford Healthcare told The Post. Asked if filthy furballs running around subways could spread to New Yorkers, he replied, “It’s not happening that way.” Only folks who ingest rodent waste or inhale particles of it in small enclosed spaces such as attics or closets are at risk of contracting the disease, he said. Subway rats, like Pizza Rat, are not likely to spread the virus — just don’t eat that pizza! The deadly virus has likely already been around the Big Apple for decades and gone under-diagnosed, Wu said. “It wouldn’t all of a sudden start happening now,” he said.…