Long-term consequences of smoking: How much cigarettes affect the immune system.. As of: March 1, 2024, 1:28 p.m By: Fabian Hartmann, Kilian Bäuml CommentsPressSplit A long-term study reveals: Smoking has long- term effects on theimmune system.

The consequences are still noticeable even years after you quit. Fewer people are turning away from smoking, but recommendations are not changing. And the best time to quit smoking is now, says the first author.