A study on mixing Covishield and Covaxin, the two main vaccines used in India's COVID-19 vaccination programme, has been given the go-ahead by the Drugs Controller General Of India (DCGI). All persons intending to visit Himachal Pradesh shall carry their COVID-19 Vaccine Certificate (double doses) or a negative RT-PCR test report not older than 72 hours or RAT negative report not older than 24 hours starting August 13 and other top stories.