High Prevalence of Hepatitis B and C viruses in the Indian state may be due to unscreened blood transfusions, and the use of unsterilized needles and syringes.

He said the reasons behind such high prevalence needed to be investigated. Anmol Gupta of the department of community medicine is also part of the team.
Unscreened blood transfusions and the use of unsterilized needles and syringes are increasing Hepatitis B and C.
Kaza, the headquarters of Spiti, is some 320 km from the state capital Shimla through Kinnaur district and equidistant from the picturesque Manali tourist resort via Kunzum Pass (4,551 meters).
Source-Medindia