Indonesia has launched a massive bird flu drill to prepare for the possibility of a human-to-human outbreak of the deadly virus.

The drill began Friday and involved a simulated outbreak of a pandemic of the disease. The exercise, which ends Sunday, began with a man contracting the disease on the resort island of Bali and will culminate with officials trying to prevent infected travelers from leaving the country and taking the virus overseas.

Indonesia Holds Massive Bird Flu Drill

Most bird flu cases involve contact with infected poultry, but experts fear the virus could eventually mutate and be spread from human contact.

Indonesia Holds Massive Bird Flu Drill

Bird flu has hit Indonesia harder than any other country in the world, and its 107 deaths from the disease account for nearly half of the global total.

Indonesia Holds Massive Bird Flu Drill

The World Health Organization says 240 people around the world have died from bird flu since 2003.