The new Delta Plus mutation of coronavirus is “a variant of interest”, not “a variant of concern”, the Government said on Tuesday. “Delta variant played a major role in the second wave. An additional mutation of this variant, known as Delta Plus, has been detected and submitted to the global data system. It has been seen in Europe since March and was brought into the public domain two days ago on June 13,” NITI Aayog’s Member Health, Dr VK Paul, said at a Health Ministry Press meet.