Computer virus shuts down ambulance network

NSW ambulance services are slowly returning to normal after a software virus forced staff to shut down the computers that coordinate the state's ambulances for more than 24 hours.

The virus crept into the Ambulance Service of NSW's dispatch system at 1 pm (AEDT) on Saturday, prompting staff to coordinate paramedics by telephone and handwritten notes.

Despite the shutdown, senior managers say no lives were put in danger and all 000 calls were answered.

By this morning, computers in three of the four ambulance control centres were back online in Sydney and the state's north and west.

The state's