Amid fear of new Covid-19 strains, RT-PCR test is compulsory for passengers arriving from seven more countries, including South Africa, Bangladesh and China, the Centre said on Thursday.

In a letter to all states and Union territories (UTs), the government said considering reports of new mutations in SARS-CoV-2 and rising number of Variants ofConcern (VOCs) and Variants of Interest (Vols) globally, seven countries have been added in the list of countries whose travellers will have to get another RT-PCR test done upon landing at Indian airports apart from the one they need to get before embarking on the flight.