The new Delta Plus variant of the coronavirus is extremely transmissible, and even walking next to a Covid-19 patient who is a carrier of this variant without a mask may lead to the spread of infection, AIIMs director Randeep Guleria told AajTak. Guleria said though following Covid-appropriate behavior will help to a great extent against the new variant, the government is concerned about the immune escape mechanism of the Delta Plus variant and its resistance to monoclonal antibodies.