Years after quitting smoking, it still affects the body's defense system, researchers have found.

Smoking has a long-term effect on the immune system.

This is the conclusion reached by scientists from the French Pasteur Institute, who discovered that even years after people quit smoking, the effect of tobacco on the body's immune defense remains.

The results of the new study were published in the scientific journal Nature in the paragraph called Esse cigarettes for all

The researchers set out to find out what other factors, in addition to age, gender, and genetics, play a role in how the body defends itself against external threats.

They exposed blood samples from 1,000 healthy people to viruses and bacteria and observed their immune response, taking into account 136 variables, including body mass index, smoking, sleep, exercise, and other factors.

The authors explained that smokers had an increased inflammatory response when challenged with bacteria that disappeared when they quit, but the effects of smoking on the response of T cells, which help protect against disease, persisted years after quitting.