NEW DELHI : Indian government leaders appealed to farmers to call off a mass protest this week for fear it could prove a viral "super-spreader" event as the country's overall death toll from Covid-19 crossed 300,000 on Monday.Over a third have died over the past three weeks during a devastating second wave fuelled by a new virus variant detected in India, mass political and religious gatherings, and lowering of the guard by the public, health officials and experts say.Now farmers have stirred fresh alarm by saying they will hold mass protests across the country on Wednesday to mark six months of their campaign against deregulation of agriculture markets.Farmers are camped out on Delhi's outskirts despite a great risk of infection to.