A new and more infectious COVID19 strain has been identified in the United Kingdom. What is this mutation? "Mutation in any living creature is a natural process. Complex organisms do it slowly. RNA viruses generate more mutations, which is why they are notorious and difficult to control. COVID19 is an RNA virus," explains Rakesh K Mishra, Director, CSIR - Centre for Cellular and Molecular Biology (CCMB). He speaks to Govindraj Ethiraj about what we know yet about the new coronavirus type and why it is more infectious.