Condition: COVID-19 Infection · Immunization; Infection · Sponsor: Sun Yat-sen University
The goal of this observational study is to evaluate the protective effect of immune barrier on secondary infection after COVID-19 (coronavirus disease 2019) vaccination or COVID-19 virus Omicron B A. 5.2 strain infection by dynamically monitoring the COVID-19 antibody titer, cellular immune function and the occurrence of secondary infection of healthy participants, mainly medical staff in our hospital, to understand the cross protective effect of COVID-19 antibody on different variants of Omicron, and explore the best time to use COVID-19 vaccine to strengthen immunity after Omicron mutant infection.
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| The Third Affiliated Hospital of Sun Yat-sen University | Guangzhou, Guangdong, China | Recruiting |
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Source record: clinicaltrials.gov/study/NCT05774093