Zafar, Nishat, Muhammad Aslam, Ashiq Ali, Aisha Khatoon, Abdul Nazir, Qaisar Tanveer, Muhammad Bilal, Rabia Kanwar, Azka Qadeer, Muhammad Sikandar, and Abdullah Zafar. “Probiotics: Helpful for the Prevention of COVID-19?”. Biomedical Research and Therapy 7, no. 11 (November 5, 2020): 4086-4099. Accessed December 23, 2024. http://bmrat.biomedpress.org/index.php/BMRAT/article/view/646.