NEW DELHI : India, which has seen over 4 lakh Covid-19 cases by now, would record over 6 lakh cases by July 1 and the numbers are set to increase further as a systematic plan and implementation has not happened in India in a uniform manner to control the spread of the virus, a top Indian-origin researcher from University of Michigan in the US has stressed.In an interview with IANS, Bhramar Mukherjee, who is professor and chair of biostatistics at the University of Michigan's School of Public Health, said the country needs more rapid testing at this juncture to flatten the virus curve."India has tested about 0.5 per cent of its population whereas the median level worldwide is around 4 per cent of the population.