Timeline of potential coronavirus vaccine distribution raises questions

Among the first of the questions that lie ahead for a potential coronavirus vaccine are who will get the vaccine and when? If all goes well, the first doses of a coronavirus vaccine could be available by the end of the year, according to a John Hopkins University expert. But that's where the questions start. How long will it take the U.S. Food and Drug Administration to review the coronavirus vaccine candidate? Who will get an authorized vaccine first?