Flu And Smoking Research

Previously, researchers thought that smoke suppressed the immune system's response to viruses, leaving people weakened and more likely to die from infection.

Now, a study has found that smoke can cause excessive stimulation of inflammation reactions rather than suppression of the immune system. These excess inflammatory responses lead to more severe damage than the viruses would cause otherwise.

In an animal study, mice were exposed to smoke from the equivalent of two cigarettes daily for two weeks.

When exposed to a flu virus, the animals in the smoking group were able to clear the virus normally, but suffered excessive inflammation (over-stimulated inflammatory pathways) and greater tissue damage including fibrosis tissue scarring and cellular death.

While this study is preliminary, it opens new doors to work with the permanent tissue damage and early deaths from smoking (Kang MJ, Cigarette smoke selectively enhances viral PAMP- and virus-induced pulmonary innate immune and remodeling responses in mice, Journal of Clinical Investigation, July 2008).

Learn about green tea and flu prevention here

Influenza Viruses
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