While there are no guarantees, "I feel good about the projected timetable," Fauci told Reuters in an interview.

His comments follow promising early stage data for the Moderna Inc's coronavirus vaccine, released on Tuesday, that was developed by scientists at the National Institute of Allergy and Infectious Diseases, which Fauci directs.

Many experts see a safe and effective vaccine as the only way out of the pandemic that has infected millions and killed more than 575,000 people worldwide.

Fauci said Moderna's results were especially promising because the vaccine appeared to offer the type of protection seen in a natural infection.

In vaccine development, "one of the things that you hope for is that your vaccine induces a response that's comparable to a natural infection, because theoretically, the best vaccine you could possibly ever get is a natural infection."

Moderna's candidate, which is set to enter the last stage of testing on July 27, is just one of more than a hundred vaccines in development globally, but only one of a few contenders that have earned millions of dollars in backing from Operation Warp Speed, the White House program that aims to deliver more than 300 million doses of a safe and effective COVID-19 vaccine by January. Read more at JPost