The Coronavirus Disease 2019 (COVID-19), Severe Acute Respiratory Syndrome-Coronavirus 2 (SARS-CoV-2), Omicron (B.1.1.529) Variant of Concern and the New Omicron Subvariant BA.2: What We Know So Far?. Jalalabad Med. J. 2025;19(2):43-46. doi:10.3329/jmj.v19i2.79388