Yes! I was in delhi and kathmandu and wished that i had some mask to filter out the awful air pollution. My lungs and throat felt sore, and in the end i developed a cold which eventually led me to being bedridden for a day. I cant fathom how the regular people can tolerate that toxic from day to day, it's just awful. Maybe they cant but the overabundance of mopeds and lack of sidewalks makes me think otherwise.