During winters, many patients die in the tribal Lahaul Spiti district as heavy snowfall snaps the road connectivity with Kullu while in the landlocked valley specialist doctors are not available for last 4-5 years. In winters, patients including pregnant women are referred to hospitals in Kullu for which helicopter service is the only medium. But this time, Rohtang tunnel will be open for medical transit and other vehicles in any kind of emergency situations.
In winter, evacuation of patients remains a challenge as availability of chopper depends on the weather conditions. The tunnel may be to be thrown open for regular traffic by next year.