covid-19 cases in Maharashtra, Kerala, Chhattisgarh and West Bengal, the Centre has written to these statCentre writes to four states witnessing surge in covid-19 cases to take infection mitigating steps, recoveries cross 1 crore markes urging them to take steps to curb the spike in new infections.In a letter, Rajesh Bhushan, secretary, union health ministry advised the states to maintain a ‘strict vigil’ and to take steps to keep a check on the rising cases, especially in view of the new strain of the virus being observed in certain countries which has also been reported in a few States in the India.The Health Secretary has drawn the attention of the States to the low and declining testing rates in the States, stating that any laxity at.