New Delhi, Feb. 23 -- Several states, including Maharashtra and Karnataka, have reimposed partial restrictions and warned of a lockdown if people continue to flout safety protocols related to Covid-19 amid fear of a second wave of infections. Some state governments have also said they will screen visitors from high-risk areas. The Centre has cautioned states about rising cases of the coronavirus disease and said that Covid-19 protocols and guidelines must be followed strictly to check the spread of the infection.

Maharashtra, Kerala, Punjab, Chhattisgarh and Madhya Pradesh have been asked by the Centre to ramp up testing and monitor new strains of the infection after a sudden spike in Covid-19 cases across the country.

India recorded 10...