Mortality in Four Waves of COVID-19 Is Differently Associated with Healthcare Capacities Affected by Economic Disparities.
Lan YaoJ Carolyn GraffLotfi AleyaJiamin MaYanhong CaoWei WeiShuqiu SunCongyi WangYan JiaoWeikuan GuGang WangDianjun SunPublished in: Tropical medicine and infectious disease (2022)
Conclusions from the first wave of the COVID-19 pandemic do not apply to the following waves. The clinical outcomes in developing countries become worse along with the expansion of the pandemic.