New Delhi: Russia's sovereign wealth fund CEO on Saturday said he's 'delighted' that AstraZeneca has resumed trials of its Covid-19 vaccines but said the suspension of trials "clearly showed fallacy of their approach".AstraZeneca has resumed British clinical trials of its Covid-19 vaccine, one of the most advanced in development, after receiving the green light from safety watchdogs, the company said on Saturday.The late-stage trials of the experimental vaccine, developed with researchers from the University of Oxford, were suspended this week after an illness in a study subject in Britain, casting doubts on an early rollout."Delighted that AstraZeneca has resumed trials.