Covid immunity is fleeting. This complicates the vaccine race
With such short-lived antibodies, doctors believe a successful vaccine will have to do more
Immunity to coronavirus among those who have recovered from the infection may only last for a few months, two separate studies have suggested.
Scientists from King’s College London analysed 90 patients and healthcare workers at Guy’s and St Thomas’ NHS Trust and found the level of antibodies in the immune system peaked three weeks after showing symptoms.
In the first longitudinal study of its kind, 60% of participants were found to have a “potent” antibody response while in the throes of the virus, but this fell to 17% after three months. Levels of antibodies depleted by as much as 23-fold in the three-month period after infection and in some people became undetectable...