Dr. Anthony Fauci considered leaving the White House at the end of President Donald Trump's term but it did not happen. However, this time it is happening in December 2022 during President Joe Biden's term.

Dr. Fauci will leave his titles as the United States' top infectious disease expert and adviser of the White House as its chief medical advisor at the end of the year. He will also be leaving the National Institute of Allergy and Infectious Diseases, which he has led since 1984. 

"After more than 50 years of government service, I plan to pursue the next phase of my career while I still have so much energy and passion for my field," Fauci said in a statement. "I want to use what I have learned as NIAID Director to continue to advance science and public health and to inspire and mentor the next generation of scientific leaders as they help prepare the world to face future infectious disease threats."

Dr. Fauci, 81, has advised seven presidents throughout his roughly 40-year tenure. From Ronald Reagan to today's current president, he helped the nation through HIV/AIDS, West Nile virus, the anthrax attacks, pandemic influenza, various bird influenza threats, Ebola, Zika and most recently, COVID-19 and monkeypox.

The HIV/AIDS epidemic commenced in June 1981. It infected more than 75 million people and caused around 35 million deaths. As much as this disease was pointed towards the fault of the LGBTQIA+ community, Dr. Fauci never believed that was the case. 

"If you think a disease is going to confine itself to a particular group of people, I can't trust what you're doing," Dr.Fauci said at the time.

As President Reagan ran the White House, Fauci did not have the presidency to rely on. Yet, he still looked for funding to study HIV/AIDS.

"This was a massive outbreak but in those early years, officials in the Reagan administration were not particularly amenable to going out and speaking about this. They didn't use the presidency's bully pulpit," Dr.Fauci said.

After Reagan left office, Dr.Fauci stated that he developed strong relationships with the succeeding Presidents.

Those strengthened relationships helped Fauci in the subsequent fights against the various other health crises faced by the nation. 

Yet when the World Health Organization (WHO) declared the COVID-19 outbreak a pandemic in March 2020, the years of strong relationships with Presidents loosened during former President Donald Trump's era.

President Trump silenced Dr. Fauci, ignored expert advice, revered public-health reports were delayed and COVID-19 treatments were prematurely approved also.

Nonetheless, Dr. Fauci still implemented mask-wearing, social distancing and vaccines.

"The vaccine is essential, for your health, for the health of your family, and for those around you who might be in a situation where they have underlying conditions," Dr.Fauci said.

Ending Trump's presidency, Fauci was one of the first people President Biden called after he was elected.

"Dr. Fauci, for almost four decades, has served as Director of the National Institute of Allergy and Infectious Diseases, helping our country navigate health crises ranging from HIV/AIDS to COVID-19. As he leaves his position in the U.S. Government, I know the American people and the entire world will continue to benefit from Dr. Fauci's expertise in whatever he does next," President Biden said in a statement.

President Biden is very grateful for everything Dr. Fauci has done and believes that his contributions have saved lives in and out of the United States and also made the country stronger, more resilient and healthier because of him.

While Dr. Fauci is leaving his roles, he remains confident that high-quality, life-saving work will continue to be done. 

"N.I.H. and other positions I am leaving are served by some of the most talented scientists in the world," Dr. Fauci said. "I do not doubt that I am not leaving this work in skillful hands."