u/Firstthingsfast_alt

Hi there. I'm thinking of taking me and my dad on a trip to istanbul.

My dad has a medical condition called sarcoidosis. Its just basically a breathing condition. Day to day life he doesnt struggle with it.

However whenever we use a cities metro he has a very bad cough attack and legit cant breathe depending on how polluted it is. However on the brand new elizabeth line and on sub-surface tube lines he is a-ok.

Is the istanbul metro like the sub surface london underground lines or have modern ventilation like the Elizabeth line or does it not have much ventilation?