Warning to vapers: Scientists reveal the e-cigarette flavour that can damage your lung's immune cells and make it harder to fight infections

It's no secret that smoking e-cigarettes can lead to long-term health issues. Researchers say that berry-flavoured vapes could be far more harmful than flavourless or menthol alternatives From menthol to vanilla custard and sour strawberry, there's an estimated 40,000 vape flavours on the market today worldwide Study co-author Ajitha Thanabalasuriar at McGill University told MailOnline: 'From our study we see that the more complex flavours and additives you add to e-cigs the more bad outcomes on immunity.' Researchers tested how berry and unflavoured vapes affected the immune cells living in our alveoli by exposing mice to continuous e-cigarette vapour for 10 days As the 'crossroads' between our internal organs and the outside world, they are a critical point for immunity. After 10 days the immune cells in the alveoli of mice exposed to berry-flavoured vapes showed significantly less movement than those exposed to clean air This graph shows the movement of an alveoli immune cell after being exposed to air and to vaping for three or 10 days The findings are a worry for human health because hindering AM movement limits their ability to clear out harmful bacteria. ‹ Slide me › Healthy immune cells quickly cleared out bacteria which could threaten the mice's lungs while those exposed to vapes were not able to defend against the infection Since the researchers only tested berry and menthol vapes they cannot say which flavours would be the most dangerous.