A recent study, which has not yet been peer reviewed, researchers at the Indian Council of Medical Research explored the possible reason as to why those who have been vaccinated are still being infected by COVID-19.
Swabs from the nose and throats from 677 individuals who had tested positive for COVID-19 after receiving both jabs was collected and analysed.
Genetic analysis revealed that in 86 percent of cases, the breakthrough infection was triggered by the Delta variant – although this could simply be a reflection of the variant’s prevalence at that time.
Other research also indicates that the vaccines may be less effective at preventing coronavirus infections in the face of the Delta variant.