US President Donald Trump on Sunday declared himself immune from Covid-19 as he prepares to restart his campaigning against rival Joe Biden. “It looks like I’m immune for, I don’t know, maybe a long time and maybe a short time, it could be a lifetime, nobody really knows, but I’m immune,” Trump said in a Fox News interview, a day after his doctor affirmed he was no longer a transmission risk for the disease. “You have a President who is immune… so now you have a President who doesn’t have to hide in a basement like his opponent,” he added, in a jab at Biden and his far more cautious in his campaigning during the pandemic.