Covaxin And Covishield Works Against Alpha, Beta, Gamma And Delta Variants Of Covid-19: ICMR Covaxin and Covishield (Jagran English) Addressing a press conference, the Indian Council of Medical Research (ICMR) Director General (DG) Dr Balram Bhargava said that the Serum Institute of India's Covishield and indigenously developed Covaxin works against variants of SARS-CoV-2 like Alpha, Beta, Gamma and Delta. Also, he informed that in a first-ever study, India would come up with its findings on how effective the vaccines are against Delta Plus. Delta Plus has recently been cultured, and it is being examined whether the vaccines are effective against this variant. The report will be available in 7 to 10 days.