Loneliness caused by isolation and the post traumatic stress disorder of health workers are mental health conditions that must be addressed by nations, a World Government Summit report on the effect of the coronavirus said.

The Making Mental Wellbeing a National Priority: Actions to Build Resilience study, released on Monday, revealed the mental toll from the pandemic.

Elderly people faced months of isolation, families were prevented from attending funerals, while youngsters missed out on school and university.

The report, compiled in partnership with consultancy PricewaterhouseCoopers (PwC), estimated that poor mental health costs the global economy more than a trillion dollars a year in lost productivity.