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Haber Kaynağı: Çeşitli Haber Siteleri Omicron sublineage BA.2 remains a variant of concern The BA.2 virus, a sublineage of the Omicron COVID-19 mutation, should continue to be considered a variant of concern, scientists convened by the World Health Organization (WHO) said in a statement on Tuesday. https://news.un.org/feed/view/en/story/2022/02/1112492
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