KEY POINTS
  • "I am cautiously optimistic" that a Covid-19 vaccine could be ready for distribution by the end of 2020, Emory University medicine professor Dr. Carlos del Rio told CNBC on Friday.
  • His comments echo that of Dr. Anthony Fauci, who said earlier that day that the vaccine development timeline is still "intact."
  • "Trying to think that, a year after a virus has been identified, we will have a vaccine ready to deploy and ready to go into massive distribution, it's simply mind-boggling to me," del Rio said.

A doctor involved in a U.S. coronavirus vaccine study said he is hopeful but not convinced that an injection will be available for circulation this year.

Dr. Carlos del Rio, an Emory University professor of medicine, told CNBC on Friday that a Covid-19 vaccine could be ready in some form for distribution by the end of 2020 but cautioned that it's an unprecedented timeline.