Hi, All Herbs and condiments of our Indian diet like Sauf,Kesar,Elaichi,Clove,Tulsi can improve our immunity.Put it in water and boil it to half then drink this concoction 2-3 times a day. Also Chyawanprash has a lot of herbs but its got lot of
sugar too. So take in small portion.Deep coloured fruits and vegetables like Carrot,Beetroot,Leafy vegetables,Papaya,Watermelon,Oranges will also help.Lemon added to water 2-3 times a day will also help.