Answer:
Plenty of sleep
plenty of sports or outdoor activities to stay healty
avoid dangerous susbstances like smoking, drinking, etc
Explanation:
The second line of defense of the immune system, also an aspect of innate immunity, is the nonspecific resistance. These defense mechanisms destroy invaders in a general way and do not target specific antigens.
I believe it's First Aid.
Mild injuries can be helped by over the counter medication as they can give relief from pain and swelling,
