New Delhi, June 15 (IANS) Congress Treasurer Ahmed Patel has demanded that the rate for Covid tests should be uniform at all private labs across the country."Why should Covid-19 testing charges in private laboratories vary in different parts of the country?"It's Rs 4,500 in Ahmedabad but Rs 2,200 in Mumbai. Central govt must work with states to enforce a uniform pricing policy for private labs across the country," Patel said.In Delhi also, the cost of Covid test has been fixed at Rs 4,500 as there had been different rates. --IANS miz/vd