تصفح COVID-19 Research حسب المؤلف "Xu, Chang"
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Double-zero-event studies matter: A re-evaluation of physical distancing, face masks, and eye protection for preventing person-to-person transmission of COVID-19 and its policy impact
Mengli, Xiao; Lin, Lifeng; Hodges, James S.; Xu, Chang; Chu, Haitao ( Elsevier , 2021 , Other)In a recent timely systematic review, Chu et al. [1] assessed the effectiveness of face masks, eye protection, and physical distancing for preventing COVID-19. Because the sample sizes are not large, especially in some ... -
Methodological assessment of systematic reviews and meta-analyses on COVID-19: A meta-epidemiological study
Rosenberger, Kristine J.; Xu, Chang; Lin, Lifeng ( Wiley , 2021 , Article)Rationale, aims, and objectives: COVID-19 has caused an ongoing public health crisis. Many systematic reviews and meta-analyses have been performed to synthesize evidence for better understanding this new disease. However, ... -
Prevalence and determinants of symptomatic COVID-19 infection among children and adolescents in Qatar: A cross sectional analysis of 11445 individuals.
Musa, Omran A H; Chivese, Tawanda; Bansal, Devendra; Abdulmajeed, Jazeel; Ameen, Osman; Islam, Nazmul; Xu, Chang; Sallam, Mohamed A; Albayat, Soha S; Khogali, Hayat S; Ahmed, Shazia N N; Himatt, Sayed M; Nour, Mohamed; Elberdiny, Aiman A; Abdallah, Abdallah Musa; Furuya-Kanamori, Luis; Al-Romaihi, Hamad E; Doi, Suhail A R; Al-Thani, Mohammed H J; Farag, Elmoubashar Abu Baker Abd... more authors ... less authors ( Cambridge University Press , 2021 , Article)There is a paucity of evidence about the prevalence and risk factors for symptomatic infection among children. This study aimed to describe the prevalence of symptomatic COVID-19 and its risk factors in children and ...