After completing his
MPH, Fukuda worked in
San Francisco Bay Area in clinics that focus on
leprosy and
tuberculosis, and then moved to
Atlanta,
Georgia, where he spent 2 years studying in the
Epidemic Intelligence Service (EIS) program at the
Centers for Disease Control and Prevention (CDC). Because of the idea that
chronic fatigue syndrome was related to chronic
infections of herpesvirus, this group was also responsible for this disease. which has since become the most widely used clinical and research definition of the illness. In 1996, Fukuda became the chief of the Epidemiology and Prevention Branch at the CDC Influenza Division, after the Division approached him. In this position, he has led investigations into outbreaks of
avian flu, including the
one in 1997 in
Hong Kong and
another in 2004 in
Vietnam. Fukuda joined the WHO in 2005 and became a scientist at the
Global Influenza Program, and was promoted to coordinator in 2006 and director in 2008. The
media referred to him as the WHO "flu chief" during the
2009 swine flu pandemic, when he was the face of the WHO to the media. He admitted the communication from the WHO during the pandemic was inadequate. He was also the Special Adviser on Pandemic Influenza to the Director-General throughout the pandemic, from October 2009 to August 2010. Fukuda officially became the Assistant Director-General for Health Security and Environment in 2010, until 2015 when he switched to the role of Assistant Director-General and Special Representative of the Director General for
Antimicrobial Resistance. In December 2016, Fukuda joined the School of Public Health at
Li Ka Shing Faculty of Medicine,
University of Hong Kong, as
clinical professor, and often gave global and local media interviews. In October 2020, HKU reportedly would not renew his contract after it expired at the end of 2021, citing Fukuda's age has passed the university retirement age of 60. He left the government COVID-19 expert panel on December 1, and HKU on December 8, 2021, moving back to
Atlanta,
Georgia for retirement. == Personal life ==