换一批摘要COVID-19 pandemic has become a serious public health crisis for developed and developing countries around the world.As of February 17,2022,over 420 million cases including 5.8 million deaths have been reported across the globe[1].The first case of COVID-19 in Pakistan was detected on February 26,2020;since then,the toll of confirmed COVID-19 cases reached 1491423 including 29 877 deaths as of February 17,2022[1].
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