Epidemiological Study on Asymptomatic Infections and Mild Illness With Covid-19 in Shanghai

Epidemiological Study on Asymptomatic Infections and Mild Illness With Covid-19 in Shanghai

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.

Inclusion Criteria:

• SARS-Cov-2 RNA positive.
• asymptomatic or mild clinical manifestation.
• informed consent signed.

Exclusion Criteria:

• informed consent rejected.