When smokers in a new study quit, their immune response got better at one level, but it didn’t completely recover for years.
Mandatory Credit:	Catherine Falls Commercial/Moment RF/Getty Images

When smokers in a new study quit, their immune response got better at one level, but it didn’t completely recover for years.
Mandatory Credit: Catherine Falls Commercial/Moment RF/Getty Images

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Smoking’s effects on immune system can last years

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.