Amid detection of newer variants of coronavirus globally, the Centre on Monday held a high-level meeting and asked states to ramp up whole genome sequencing of positive samples and keep close watch on the global variants. Principal Secretary to Prime Minister, Dr P K Mishra, after the deliberations highlighted that while the Covid situation in the country remains stable and public health systems remain geared up, there is need for states to monitor trends of influenza-like illness (ILI) and severe acute respiratory infection (SARI) cases, an official statement said.