By Reuters Staff 6 Min Read A video featuring a university professor addressing a crowd at Speakers’ Corner, London, includes various false and misleading claims. Reuters Fact Check. REUTERS The speaker suggests that masks are causing brain damage in police officers and that COVID-19 will disappear by April, both of which are claims contradicted by the available evidence. She also alleges that a trial of a new COVID-19 vaccine “made everybody positive for HIV”. However, researchers explained that while antibodies generated by the vaccine were found to lead to some false positive HIV test results, follow up tests showed no HIV virus was present.