City has many vape shops with large customer bases, providing nicotine products at various price levels
Use of e-cigarettes has increased from 29% to over 40% in the last five years in Pakistan
Research states battery-powered devices more harmful than conventional smoking
Experts highlight health hazards of electronic cigarettes
Warns that so-called vaping increases the risk of heart disease and lung disorders
The devices are already banned in Brazil, Singapore, Thailand and the US state of Massachusetts
Several ingredients inhaled through vaping may lead to inflammation, oxidative stress and unstable blood flow
Move comes after New Delhi banned sale, import and manufacture of e-cigarettes this month
In the past weeks, a wave of severe vaping-linked pulmonary disease causes seven deaths in the US
Trump's administration also announces that it will soon ban flavoured e-cigarette products