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… weakened immune systems, such as people who have long-term illnesses or people who have had major surgery or other … weakened immune systems, such as people who have long-term illnesses or people who have had major surgery or other …
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… you quit smoking, you will probably have fewer of these illnesses. After you quit smoking, the damage to the lung … you quit smoking, you will probably have fewer of these illnesses. After you quit smoking, the damage to the lung …
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