Map reveals how Delta variant has run rampant in weeks The Delta variant is now dominant in nearly every local authority across England Delta is now the dominant variant with more than half of Covid infections in US, says CDCDelta accounts for 51.7% of the Covid-19 cases in the US What are the dominant Covid-19 variants in the US?Experts anticipate the Delta variant to become the United State’s dominant strain in one month Five questions and answers on the COVID-19 delta variantThe delta variant of the coronavirus is spreading rapidly across the world, prompting new lockdowns and restrictions in certain countries. In the U.S, it accounts for an increasing number of new infections. COVID-19: Delta variant cases up 46% in a week - as expert warns mutant strain will hit UK 'soon'Despite the big rise, hospitalisations are not rising at anywhere near the same rate - indicating that vaccines remain effective. Delta variant gains ground in U.S., men do worse with COVID-19The following is a roundup of some of the latest scientific studies on the novel coronavirus and efforts to find treatments and vaccines for COVID-19, the illness caused by the virus. India reports 40 cases of new 'delta plus' strain'Variant of concern' sparks worries of third wave of COVID-19 In India, concern mounts over a variant called Delta Plus.The version of the virus has been found in several other countries, too. Officials say that they are gathering data about its strength and emphasize that vaccines still offer protection.