The seventh “WHO report on the global tobacco epidemic” said blocking the industry’s interference was critical to cutting the harm from tobacco use.

“The tobacco industry has a long history of systemic, aggressive, sustained and well-resourced opposition to tobacco control measures,” the report said.

“While some strategies are public and others more covert... all have the goal of weakening tobacco control.”

The report said tobacco giant Philip Morris International was trying to position itself as a responsible public health partner via its “Unsmoke” campaign, which encourages people to “change to a better alternative”. The WHO said the campaign aimed to ensure tobacco remained socially acceptable, while confusing consumers with terms such as “smoke-free products”, which may refer to products with toxic emissions and unknown short-term and long-term health effects.