Covid-19 strain in Britain.The SOPs for epidemiological surveillance and response is in the context of new strain in UK, the Union Health Ministry said in a statement.Releasing the SOP, the ministry of health and family welfare (MoHFW) said this new variant of the virus is estimated by the European Center for Disease Control (ECDC) to be more transmissible and affecting younger population.Under the guidelines, the government has directed that all international travellers will be required to declare travel history of past 14 days and fill up the self-declaration form to be screened for COVID-19.States are directed to get list of returnees."UK passengers travelling from Dec 21-23 would be subjected to RT-PCR test on arrival and passengers.