US President Joe Biden has tested positive for Covid-19, the White House said in a statement on Wednesday evening. Biden is “vaccinated and boosted and he is experiencing mild symptoms,” White House Press Secretary Karine Jean-Pierre said in a statement. The positive test came following an event Biden attended in Nevada, according to the statement. Biden will be returning to his private residence in Delaware “where he will self-isolate and will continue to carry out all of his duties fully during that time,” Jean-Pierre said. Biden’s doctor said the president had shown “upper respiratory sympt…