How can we stop the endemic of leprosy in New York from spreading to the rest of the country?

Stop the illegal immigration, period. I know in the past those immigrating legally had to p a physical to be sure they were not bringing in diseases and sickness that we do not find here in our country. If these physicals have been stopped for whatever reason, perhaps they need to be reinstated for those immigrating to our country legally. Same goes for Visa's etc.