IJSR International Journal of Scientific Research 2277 - 8179 Indian Society for Health and Advanced Research ijsr-10-7-36013 Original Research Paper Comparison of clinical, radiography and antigen testing for early recognition of covid infection in the emergency department. Ashima Sharma Dr. Dr Abhishek J Arora Dr. Shalini Pasupaleti Dr. July 2021 10 7 01 02