vaccine

Updated at 4:15 p.m. ET

A coronavirus vaccine could be ready for distribution by the end of the year, and distributed to Americans in 2021, the nation's top infectious disease specialist told lawmakers Friday.

While it typically takes years to develop vaccines, new technologies, the lack of bureaucratic red tape and the human body's robust immune response to COVID-19 have hastened the process, Dr. Anthony Fauci said.

The COVID-19 vaccine candidate made by the U.S. biotech company Moderna and developed in collaboration with the National Institutes of Health starts its final phase of testing Monday.