By Smitha Mundasad
The report estimates that hepatitis infections and their complications led to 1.45m deaths in 2013 - despite the existence of vaccines and treatments.
World Health Organization data shows there were 1.2m AIDS-related deaths in 2014, while TB led to 1.5m deaths.
The WHO has put forward a global strategy to tackle hepatitis.
Researchers say these plans must be put into action urgently to tackle the crisis.