I've heard claims from Indian ministries that Covaxin the is indeed effective against ALL the variants,(double mutant, South African, UK). Of course, these are simple claims, without an ounce of published data, hardly worth the 2ruppees per tweet salary of whoever puts these claims out. By all means, show me some peer reviewed data that it is effective as such. We'd all like that in fact. The only vaccine which has shown significant potential against ANY variants is the Pfizer one. Astrazenica and Pfizer are both scrambling to get a new vaccine ready for Autumn that is effective against the SA variant. Nobody has started work on a vaccine against the double mutant yet. SII should be leading the way on that certainly - not clear that they can at present though, given their problems in producing the first vaccine.