I feel like my immune system is pretty weak and I feel like its because of the lack of fruits and vegetables in my diet. I am 5'11" 190 lbs, I am happy with where I am at weight wise, I just want to boost my immune system by adding some fruits and veggies. So here are my questions:

1. How many servings of fruit/day and how many servings of veggies/day?

2. Is there a difference between canned and fresh veggies? Does it matter?

3. Is there a difference between regular fruit and dried fruit? I really like dried fruit and its easier to find the stuff I like all year around.

These are the fruits I like: bananas, apples, peaches, oranges, grapes, kiwi.

Vegetables: asparagus, corn, lol, that's about all I can think of.

Anything I should add, avoid? Any tips? Thanks.