The Centre said that the rise in coronavirus cases in the country has been more or less linear, not exponential. "Our focus is on the districts now. The way positive cases moved in India, the growth is more or less linear and not exponential. Certain strategies are in work to contain it to a particular level. Beyond this, looking at the story of positive cases in these 30 days, we are more or less in the same position where we were one month ago. Among those tested, 4.5 per cent cases have returned positive," said CK Mishra, environment secretary.