They can act as a bridge toward quitting completely
"Tobacco use and second-hand smoke exposure in reproductive-aged women can cause adverse reproductive health outcomes, such as pregnancy complications, fetal growth restriction, preterm delivery, stillbirths, and infant death." Anti-Smoking Campaigns in China There is no nationwide law banning smoking in indoor public places, but the government has tried to ban the practice
Bronchoscopy: Allows direct examination of the airways when necessary
Jahnel T, Ferguson SG, Shiffman S, Thrul J, Schz B
Heathrow International Airport With more than 500,000 square feet of duty-free shopping, you're likely to find some good deals here in Londons Heathrow Airport