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Background
In the first half 2022, SARS‐CoV‐2 variant omicron rapidly spread in Shanghai.
Case presentation
A 74‐year‐old woman, diagnosed as having rheumatoid arthritis for almost 30 years and treated with prednisone and cyclophosphamide, went through nasopharyngeal swab RNA test for SARS‐CoV‐2 for routine screening and was positive. She was then sent to the designated hospital. After negative...
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