I constantly suffer from cold and throat infection. Doctor recommend me to increase immunity. Kindly address my General queries 1. What are the tests for immunity. How do I check my immunity level. 2. How do I increase my immunity level. 3. I eat healthy diet. I have avoided junk food from 6 months.

If you do not have any chronic illness it is unlikely you are having low immunity. In case you have any chronic illness do let me know I will suggest you investigations if at all required. Meanwhile cover your body well, avoid frequent ins and outs of AC rooms. Avoid exposure to dust fumes and dirt, take fresh seasonal fruits and vegetables and adequate amount of rest.  

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