More than 120 cases of lung disease in 15 states could be linked to vaping
https://edition-m.cnn.com/2019/08/17/health/vaping-lung-disease-states/index.html?r=https%3A%2F%2Fedition.cnn.com%2F
In some states of the US, vaping is legal. It means some patients have lung disease caused by vaping. So, experts should classify them into those who've never used electronic cigarettes or those who often vape.
So, more patients will be needed to investigate real effects of electronic cigarettes.
