Foods rich in protein: pulses and legumes, dairy products, eggs
Foods rich in Vitamin C: Amla, guava, capsicum, lemon, oranges, amaranth leaves
Foods rich in Zinc: Nuts and seeds, eggs, pulses
Good fats: Almonds, walnuts, flax seeds, chia seeds
Pre-probiotics: Curd, kanji,raw banana, flax seeds, raw onion
Sunshine and good hydration
Anti-virals in the kitchen:Ginger, garlic, tulsi, turmeric, lemongrass
All of these are must for immunity and should be taken throughout.
They work best along with healthy lifestyle.