President Joe Biden said he was feeling great and had got through COVID with only mild discomfort, he said Wednesday morning, but he suggested Americans should wear masks indoors as the nation grapples with the latest infectious variant. And he paid tribute to vaccinations, which he said allowed him to stay in the White House in contrast to President Donald Trump who had to be airlifted to hospital. 'Here's the bottom line: When my predecessor got COVID he had to get helicoptered to Walter Reed Medical Center,' said Biden, 79. 'He was severely ill. Thankfully he recovered. 'I got COVID,...