The Delta variant of the SARS-CoV-2 virus is becoming quite a cause for concern with its mutation! The World Health Organisation tagged B.1.617.2 strain as the 'Delta' variant of COVID19, that identified as one of the drivers of the second wave of coronavirus infections. Now, this variant further mutated to form the 'Delta plus' or 'AY.1' variant. So far, cases of the Delta Plus variant have been reported in four states: Maharashtra, Madhya Pradesh, Kerala and Karnataka. The Union Health Ministry had earlier said that Delta Plus is not a 'variant of concern' right now as it has not been conclusively proved that the strain poses 'adverse consequences' to humanity by increase in transmissibility and severity.