How can I strengthen my immune system?

Middle through high school I struggled with an eating disorder, and while I'm better, it did a lot of damage on my body, including my immune system. I keep getting sick over and over again. I'll have a cold for a week, get rid of it, feel good for a few days, then get sick again. Is there any way I can... show more Middle through high school I struggled with an eating disorder, and while I'm better, it did a lot of damage on my body, including my immune system.
I keep getting sick over and over again. I'll have a cold for a week, get rid of it, feel good for a few days, then get sick again.
Is there any way I can make my immune system stronger?
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