(CNN) People who have been sick with coronavirus infections should stay away from other people until they've gone at least three days with no fever, have seen symptoms improve, and until it's been 10 days since they first noticed symptoms, the US Centers for Disease Control and Prevention said in updated guidance. The CDC updated guidance on when it's safe to leave quarantine, as well as some consumer-friendly guidance on using public transit and ride shares as states loosen restrictions on opening schools, businesses and leaving home. People who have been infected need to be sure they won't spread the virus, even if they feel better, the CDC advised. How many people have coronavirus? Sometimes, it's just a guess "Depending on your healthcare provider's advice and availability of testing, you might get tested to see if you still have Covid-19. If you will be tested, you can be around others when you have no fever, symptoms have improv...