An investigation of a hundred COVID-19 cases and close contacts in Ethiopia, May to June, 2020: A prospective case-ascertained study.

Shambel Habebe Watare,Mikias Alayu Alemu,Adamu Tayachew,Negussie Yohannes, Lehageru Gizachew,Adisu Kebede, Asdesach Tessema, Wubayehu Kassa,Mengistu Biru, Mikias Teferi,Naod Wendrad,Kirubel Eshetu,Gizaw Teka,Habtamu Yimer, Faiqa Ebrahim, Dagnachew Mulugeta, Alemnesh Mirkuze,Saro Abdela,Musa Emmanuel,Abdulhafiz Hassen, Mesfin Wosen, Mukemil Hussen,Yaregal Fufa, Getachew Tolera,Zewdu Assefa,Aschalew Abayneh,Ebba Abate

PloS one（2022）

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摘要

The proportion of asymptomatic infection, as well as secondary infection rate among close contacts, are higher compared to other studies. The long serial interval and low basic reproduction number might contribute to the observed slow progression of the pandemic, which gives a wide window of opportunities and time to control the spread. Testing, prevention, and control measures should be intensified.

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