The Doobie Brothers are still rockin' down the highway after 51 years, despite four of the band's members being stricken with COVID-19. "We're back at work, but it's an odd time for anybody doing this," said singer, guitarist and Doobies co-founder Tom Johnston. "The option is to not go out on tour. A lot of people have chosen that option." With or without the pandemic, the longevity of the Doobies is a happy surprise for Johnston, 73. "When we started, we didn't even know what was going to happen the next day!" Johnston recalled. "How does any band know? You're just trying to get it together ...