Longitudinal changes in IgG levels among COVID-19 recovered patients: A prospective cohort study.
Ashraf Hassan AlzaabiLuai Awad AhmedAbdulla E RabooyAli Al ZaabiMohammed AlkaabiFalah AlMahmoudMai Farouk HamedKhalid Omar BashaebAbdul Rahim BakhshSuha AdilNadeen ElmajedAhmed Nigm AbousalhaAhmad Kanaan UwaydahKhulood Al MazroueiPublished in: PloS one (2021)
Our study indicates a sustained and prolonged positive immune response in COVID-19 recovered patients. The consistent rise in antibody and positive levels of IgG titers within the first 5 months suggest that immunization is possible, and the chances of reinfection minimal.