this study is to clarify the epidemiological characteristics of Omicron variant infected persons in Shanghai, such as distribution characteristics, host and clinical characteristics, disease outcome and risk factors. especially asymptomatic infections.
Study Type
OBSERVATIONAL
Enrollment
10,000
the relation between vaccination completion status and the target population
Ruijin hospital
Shanghai, Shanghai Municipality, China
RECRUITINGViral clearance time
time from viral RNA positive to negative
Time frame: 2 months
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