May 7, 2021 catholic news service
Dr. Anthony Fauci, director of the National Institute of Allergy and Infectious Diseases, speaks during a hearing on the Capitol Hill in Washington April 15, 2021. Fauci and Cardinal Gianfranco Ravasi, president of the Pontifical Council for Culture, delivered opening remarks May 6 at a three-day international online conference on health care for a healthier world. (Credit: Susan Walsh/Pool via Reuters via CNS.)
Much is still unknown about the 2019 novel coronavirus and why it can kill so many people and yet also can infect many more without causing any symptoms, Dr. Anthony Fauci, the United States' top infectious disease expert, told a Vatican conference.