john in jupiter, florida. hello. >> i'm curious to know about the impact of the illegal straining across the border. various once unknown to us. i'm wondering if the source of this, where it's coming from. resistant to the chinese pneumonia is also going on. >> i would say it was first identified in japanese patients in 2009. these things are actually coming from people who take planes here. the first people to bring it were wealthy, some from the united arabs, came here for medical treatment brought it. also an american woman who went overseas first surgery in india. she brought back. to be honest, people bringing them arege people who have mone, claim fame and i haven't seen any studies about migrants crossing borders with pathogens. i think this is a problem of first world people who are, have enough money to go from one country to another. i think the focus on migrants is probably misguided. >> what sparked your interest on reporting on this? >> i think we feel like -- visible, it popped on the scene last