In view of rising coronavirus cases, weekly positivity rates and decreasing testing figures in Assam and West Bengal, the Centre has asked the state governments to undertake a review of these parameters while stressing on strict enforcement of Covid-appropriate behaviour. In a letter to chief secretaries of Assam and West Bengal on October 26, Additional Secretary in the Union Health Ministry, Arti Ahuja, highlighted increase in weekly new Covid cases since the past week (October 20-26) and