Dr. Anthony Fauci, director of the National Institute of Allergy and Infectious Diseases, has emerged for many as the voice of reason and integrity as the nation confronts the novel coronavirus pandemic.

Much of that he learned at Regis High School, a no-tuition, Jesuit-run boys college-prep school in New York City that is renowned as an academic haven. Fauci, a member of the class of 1958, told a group of alumni last May that attending the school "was the best educational period I could ever have imagined having."

Fauci also is a graduate of College of the Holy Cross in Worcester, Massachusetts, another Jesuit institution, and Weill Cornell Medicine, then called Cornell University Medical College.

The alumni address was part of a return to Regis by Fauci, now 79 and known for his power walking, who, while not a household name at the time, was apparently nearing the end of a long career in government service working for six presidents.

"I take great comfort in knowing that when he speaks that he is speaking the truth and nothing but the truth," Jesuit Father Daniel Lahart, Regis' president, told National Catholic Reporter. Father Lahart now supervises a school, like most across the country, confined to online classes as COVID-19 disrupts normal life.

The priest said the most famous Regis alumnus has exuded integrity throughout a career, which, before this latest outbreak, was best known for raising the alarm about HIV/AIDS at the highest levels of government in the 1980s.

Fauci has emerged as a no-nonsense truth-teller in the latest crisis. While President Donald Trump has been prone to what have been criticized as overly optimistic daily briefings, it's been Fauci, frequently standing behind the president, who has tempered the optimism, whether it has been about the possibility of miracle cures or the hope of returning to business as usual.

In an interview with Science Magazine in late March, Fauci acknowledged that Trump's stretching of the truth during national news conferences creates an issue. But his response has been limited. "I can't jump in front of the microphone and put him down," Fauci told Science, a quote widely seen as an illustration of the tension between science and political talk.

"He's got a relatively good poker face. But not all of the time," Father Lahart said about Fauci.

During Fauci's visit to Regis last year -- he also visited a biology class at the school before talking to alumni -- he waxed nostalgically about his four years at Regis. Regis students come from all over the metropolitan region, picked out as eighth graders from the smartest boys from far-flung parochial schools.

The students often tell tales of heroic commutes. For Fauci it consisted of a couple of bus rides as well as two express subway trains, for a 70-minute, one-way ride to school from his home in Bensonhurst in the New York borough of Brooklyn.

He was captain of the basketball team, and if there were games and practices in Harlem, in the borough of Manhattan, or in the Bronx, another New York borough, the ride home could take nearly two hours. Regis students also were expected to do three hours of homework a night, a discipline he takes to public service.

On the first day of his freshman year, he recalled, the Jesuit dean of discipline, Father Flanagan, changed his name from Anthony to Tony, and it stuck.

Fauci said he navigated through six presidential administrations in Washington by being decidedly apolitical and nonideological. He offered insights into some of the presidents he served, beginning with President Ronald Reagan.

Reagan, who he said was personally a warm and friendly person, never even addressed the AIDS crisis until his second term, unwilling to deal with the topic for years while the epidemic raged, failing to use the presidential bully pulpit to marshal resources against the disease.

Fauci described Reagan's successor, President George H.W. Bush, as extraordinary, noting that as vice president, Bush had visited Fauci's AIDS patients. President Bill Clinton was absorbed in the science of countering AIDS, while President George W. Bush pushed Fauci to develop a program to counter AIDS in Africa, which Fauci credited with saving 14 million lives via the distribution of drugs that treated the disease.

Fauci earned the Presidential Medal of Freedom from the second President Bush for his work in Africa. But Fauci said the president was ultimately responsible for the program, motivated by a concern that the U.S. and other wealthy countries should not be the only places in the world where HIV/AIDS could be effectively treated.

Last year, he told the Regis group that the long fight against HIV/AIDS, which included times of helplessness when he was unable to assist his dying patients, were "the darkest years of my life."

Now Fauci is the public face of another dark struggle.

At his Regis talk, Fauci was asked if there was anything that kept him up at night. He responded that his days are usually so long that he always sleeps well. But there was, he said, an issue that worried him when he was awake, namely the emergence of a virus that attacks the lungs, similar to the one that killed millions during 1918 and 1919.

"I worry about a pandemic," he said last May. Now, less than a year later, his worries are a reality and he has emerged as the public face of the fight against coronavirus. He appears concerned yet unflappable.

"Right now, there is something he's trying to figure out. He enjoys the challenge," said Father Lahart.