Coronavirus disease 2019 COVID-19 is a contagious disease caused by the coronavirus SARS-CoV-2. In January 2020, the disease spread worldwide, resulting in the COVID-19 pandemic. The symptoms of COVID‑۱۹ can vary but often ادامه مطلب » ۳۰ تیر ۱۴۰۵ بدون دیدگاه