International visitors to Vancouver's Olympic Games were studied by a mapping plan for infection spread by two Canadian Infectious-disease Specialists and it was found that visitors bring infections to such gatherings and this is likely to happen in 2010 Olympic Games, that too with a bigger intensity of health threats.

Kamran Khan of St. Michael's Hospital in Toronto teamed with Montreal-born John Brownstein, of Harvard Medical School have developed a mapping strategy termed as bioDiaspora, that reads global air traffic plans to figure out the expansion of infectious diseases . Initially, Dr. Khan studied travel patterns into Vancouver and the venues of last Winter Games and concluded that the visitors bring along infections like E. coli, measles, mumps and H1N1.

Dr. Khan said, "Mass gatherings draw millions of people from around the world into a single space, and can potentially amplify the threat of infectious disease. Diseases don't respect national boundaries, but they do actually have to respect the rules that govern commercial air travel, because that's how they get around. If we can understand how the global community is interconnected, then we can understand how we share risks in the world and how we might share responsibilities for infectious disease threats".

HealthMap is an online disease-tracking tool that makes use of computer algorithms and human monitors to detect the infection spread. This is possibly a Web-enabled disease surveillance system.