** 1. Since he is getting repeated attacks of cold, thus are usually allergic and/or with decreased Immunity, thus prevention of recurrent attacks is the main aim of treatment. 2. As attacks are frequent take high protein diet : egg (white), soyamilk, pumpkin, squash, watermelon, peanuts, almonds, legumes, sprouted pulses/cereals, milk with protein powder [since blockage of nose is an issue thus yogurt and beans are not recommended] and deep breathing Exercises [anulom vilom] 3. take vegetable soup, which help thin mucus, and promote nasal drainage. 4. do not consume caffeine containing beverages, as they lead to dehydration and resulting nasal blockage 5. Pratimarsh nasya [errhine therapy] can be practiced without any complication 6. Prescription medicines for you are: syrup septilin, chitrak haritki, nardiya lakshmi vilas ras, vyoshadi vati, sitopladi churan, shadbindu tail, cephagraine nasal drops 7. For Natural Immunomodulators: i. Vitamin A: helps to maintain Thymus gland which is a powerful antiviral gland : thus mango,carrots,cantaloupe ,egg yolk,apricots,pumpkin,papaya, are ideal ii. Vitamin C: is needed for proper functioning of immune system: amla is best iii. Vitamin E: is a powerful anti oxidant which helps to stimulate antibody production: peanuts, dried apricots, cooked spinach, taro root can be taken iv. Vitamin B is important for the activity of phagocytes: eggs, cheese, pistachio, raw garlic, sunflower and sesame oil. v. Ashwagandha,Mandukparni,Shatavari,Trikatu,Vacha,Guduchi,are best Immunomdulators. 8. Regarding Immuno therapy: Doctor usually withdraw 4ml patient blood and inject immediately, deep IM, in gluteal region for stimulation of Immune system