Smoking tobacco is so harmful to the body that it changes a person's immune system, leaving them vulnerable to more disease and infection even years after they've quit, a new study found.Video above: ...

It emerges from a study of human cells that smoking can influence certain immune responses to the same extent as can age or genetics. Smoking can alter the immune system in ways that persist long ...

Nicotine stays in your system for only a few days or less, but withdrawal symptoms from nicotine can last up to weeks.

Cigarette smoking remains one of the most destructive habits a person can maintain, despite decades of public health warnings and overwhelming scientific evidence documenting its dangers. Each year, ...

Like other factors such as age, sex and genetics, smoking has a major impact on immune responses, according to a new study. In addition to its short-term impact on immunity, smoking also has long-term ...

(CNN) — Smoking tobacco is so harmful to the body that it changes a person’s immune system, leaving them vulnerable to more disease and infection even years after they’ve quit, a new study found.