australia s prime minister says his country won t be intimidated, after facebook blocks the country s news feeds in a row over a new law. and a nail biting day for nasa, as it aims to land its perseverance rocket on the surface of mars. good afternoon and welcome to bbc news. there s been a marked decline in levels of coronavirus infections in england since january, say scientists tracking the epidemic. a study by imperial college london found that infections have fallen by two thirds across england since the latest lockdown began, with an 80% fall in the capital itself. but it warns that levels are still high, particularly among primary school age children and young adults, with 1 in 200 testing positive between the 4th and 13th february. that s similar to levels seen in september. our health correspondent, katharine da costa, has the details. friends and family kept apart. many businesses kept on hold. lockdown has taken its toll on all of us, but researchers say it has hel
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