Headaches, confusion and delirium experienced by some Covid-19 patients could be the result of the coronavirus directly invading the brain, according to a study published Wednesday.The research is still preliminary – but offers several new lines of evidence to support what was previously a largely untested theory.According to the paper, which was led by Yale immunologist Akiko Iwasaki, the virus is able to replicate inside the brain, and its presence starves nearby brain cells of oxygen, though…