The Chinese government has stepped up its aggressive resistance against efforts by Western scientists to probe Covid’s origins – and is accusing the US of spreading fake news about laboratories in Wuhan. Ahead of US intelligence experts finalising a report demanded by President Joe Biden into the pandemic’s cause, which is expected on Tuesday, Beijing officials have demanded that Washington opens for public scrutiny a US military laboratory in Maryland . In this tit-for-tat, it is understood that US analysts have obtained data and research by Wuhan laboratories in order to compare and examine genetic sequences on shared online databases….