Covid Delta Plus Variant: Be Cautious, But Don’t Panic, Say Doctors Noting the highly infectious nature of the Delta-plus variant, former chief of the Indian Council of Medical Research, Dr Gangakhedkar said a vaccine is also less effective to it. Outlook Web Bureau 28 June 2021, Last Updated at 7:14 am Representational image Outlook Web Bureau 2021-06-28T00:03:09+05:30 Covid Delta Plus Variant: Be Cautious, But Don’t Panic, Say Doctors outlookindia.com 2021-06-28T07:14:36+05:30 Also read Dr Raman Gangakhedkar, former ICMR chief, has said that the delta-plus variant of coronavirus is highly infectious but there is no need to panic. As per the ICMR data, over 70 per cent of people have managed to develop immunity against Covid-19, however, the country appears to be heading towards herd immunity but the Delta-plus variant has created a frightening environment.