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"5 ppm decrease" » "5 ppm decreased" (Expand Search), "5 ppm increase" (Expand Search)
"19 _ decrease" » "19 _ decreased" (Expand Search), "19 _ increase" (Expand Search)
"_ web decrease" » "_ web decreased" (Expand Search), "_ web increase" (Expand Search)
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Turning point in COVID-19 severity and fatality during the pandemic: a national cohort study in Qatar
Published 2023“…In the post-first omicron phase, incidence rate of fatal COVID-19 decreased by 90.0% compared with earlier stages. Both severity and fatality exhibited an exponential increase with age and a linear increase with the number of coexisting conditions. …”
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