This is Dr. David
I see the other expert has opted out
you have to first quit smoking. smoking suppress your immune system and weakens your immune system
no treatment will help when you are still smoking.
you also have to eat healthy and eat fresh fruits and vegetables and get proper sleep during the day
regular exercise and stretching and yoga also can help improve your immune system to help you fight against virus infection.
these are the best methods to help improve your immune system.
you can also take a probiotic pill daily to help add good bacteria into your bowels to help your bowel immunity.
eating yogurt daily as well adds good bacteria into your bowels to help with bowel immunity.
washing your hands frequently with soap and water is also good practice to kill virus before they enter your body.
let me know if you have other questions.
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