Keep yourself hyper oxygenated by doing pranayam and meditation to increase the immunity.
All citrus fruits ,papaya, Kiwi & berries,coloured vegetables like bell peppers, broccoli,green leaves all are good to boost immunity.
Drink nut milk add a pinch of turmeric + black pepper,cacao powder and a soaked date to sweeten it.
Herbal teas are great way to clean the system and boost immunity.
Start your day with 1tsp of organic amla powder (indian gooseberry)
Cough relef- stops oil, ghee, dairy and all animal products for few days, you will a benefit in your condition.
Drinking ginger tea helps in cleansing the throat. Chew on licorice roots/drink tea made by boiling roots in the water.
Nuts( handful), seeds( 3tbs), 1 avocado, 2tbs nut butter, Raw coconut or coconut chips/ coconut milk