Shrwani, Khalid, Nabil Dhayhi, Waleed Mahallawi, Alaa Sherwani, Mohammed Badedi, Saeed Aldossari, Abdulrahman Muhajir, et al. 2023. “The Protective Mechanism Against COVID-19, Antibody Vs Cellular Immunity: An Extensive Review”. International Journal of Innovative Research in Medical Science 8 (08):300-307. https://doi.org/10.23958/ijirms/vol08-i08/1721.