Daily Star's biggest headlines straight to your inbox!A Chinese whistleblower has revealed US authorities were warned about a potential worldwide virus in Wuhan four months before the Covid pandemic was declared.Defector and democracy campaigner Wei Jingsheng claims that the crucial warning was ignored by officials despite his repeated attempts.The former Chinese Communist Party insider made the revelation in a new Sky News Australia documentary called ’What Really Happened in Wuhan’.Mr Jingsheng said he alerted US intelligence agencies back in November 2019 but said officials were not "heavily concerned".He said: “I felt they were not as heavily concerned as I was so I tried my best to provide more detailed information."He continued: “They.