According to Dr. Anthony Fauci, director of the U.S. National Institute of Allergy and Infectious Diseases, 100 million doses of a coronavirus vaccine will be available by year's end, CNN reported.

"Then, by the beginning of 2021, we hope to have a couple hundred million doses," Fauci said during a conference with the Journal of the American Medical Association.

It's still not clear which vaccine will be effective. One vaccine candidate, developed by drug company Moderna and NIAID, will start phase 3 trials by mid-summer, Fauci said.

"The real business end of this all will be the Phase 3 that starts in the first week of July, hopefully," Fauci said. "We want to get as many data points as we can."

Read the full HealthDay story.