Health authorities have asked all residents, or workers, in specific areas of Harrow, Ealing, Hillingdon and Brent to carry out a molecular test even in the absence of symptoms Sweep test in West London after the increase of the cases of the Indian variant of Covid in Great Britain (3,424 cases in the last week, two thousand more than last week). Health authorities have asked all residents, or those who work, in specific areas of the neighborhoods of Harrow, Ealing, Hillingdon and Brent to carry out a molecular test even in the absence of symptoms. The contacts of people positive to variant B1617.2 are traced, who will also have to remain in isolation. The cases of the variant are concentrated in the North West of the country and in London.