Healthcare is a tricky business, there is a lot of regulations by countries as to if people can provide healthcare services to different country members. To some extent, i believe yes! services such as advices, checkups through video sharing and maybe general knowledge seekers can be given through experty but when compared to the full services of a specialist or a doctor which generally requires physical examination or laboratory tests might be difficult. There can be some issues with wrong service provided as well which again can be difficult to manage through experty. The legal framework is different in different countries and assuming the user base will be mostly from american and european countries whereas the service providers might be from asian countries, there can be a bit of a issue.