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Mankind is at global threat today due to COVID-19 disease caused by a virus known as SARS-CoV-2. WHO has reported this virus as pandemic to be a global public health emergency. As of now, there is no vaccine or curative medicine to stop this COVID-19 virus. Consequently, it is essential for individuals to boost their immunity to fight against the virus. Nutrition enriched diet can help in maintaining immunity, strengthens immune system and to prevent viral infections. In the present review attempts were made to explain the different branches of immune system with the classification tree and strived to evaluate the evidences that has been trailed clinically from the past that analyzed nutrition-based mediations to handle and treat viral diseases. Review summarized possible advantages and immune boosting properties of some essential nutrients of human system such as vitamins, trace elements, probiotics, nutraceuticals, and some healthy practices that enhance immunity against particularly viral infections.