What the study saysAs per the study, in the present group of vaccine breakthrough infections investigated using genome sequencing, closely overlapping and mirroring the coronavirus cases in Delhi, the variants of concern are B.1.617.2 and B.1.1.7 comprising the majority of cases.While a number of vaccine breakthrough infections have been reported previously, it has been largely associated with non-severe symptoms.
During the subsequent course of illness, neither disease worsening (stable biomarkers) nor mortality was reported in the present group, confirming the previous observations.Out of the 63 breakthrough infections, 36 patients received two doses, while 27 received at least one dose of the COVID-19 vaccine.