A new ICMR study has found that most COVID-positive patients, who had received at least one vaccine dose before catching the infection, were infected by the Delta variant. The ICMR study is the first such analysis on breakthrough infections post-vaccination. The study shows that most vaccinated individuals were infected by the Delta variant in India. However, the death rate among vaccinated individuals was found to be very low. The clinical characterization was done on about 677 participants. Out of these 677 COVID-positive participants, 71 had taken the Covaxin vaccine while the rest 604 had got the Covishield vaccine. Two of the participants had also taken the Chinese Sinopharm vaccine.