Mumbai/ New Delhi: The Brihanmumbai Municipal Corporation (BMC) on Thursday barred Metropolis Laboratory, Mumbai's largest private laboratory, from conducting coronavirus tests for the next four weeks.The ban comes in the wake of complaints of delays in preparing covid-19 test reports."The lab has been barred from sample collection and testing for four weeks in BMC's jurisdiction," said a BMC official.A spokesperson for Metropolis was not immediately available for comment.According to a June 5 direction from BMC all covid-19 samples must be tested within 24 hours.Delays in report leads to delay in contact tracing thereby delay in treatment and in some cases, death, the BMC said.With 54085 cases, Mumbai has the maximum number of cases in the.