Chen Chien-jen

In March 2019, Chen announced that he would not seek a second term as vice president alongside Tsai. Chen received international attention for his role in leading Taiwan's response to the COVID-19 pandemic due to his unique position as both vice president and his epidemiologist background. Days before he stepped down from the vice presidency, Chen stated that he would return to the Academia Sinica as a research fellow and thus forgo the pension connected to his political office.

On 16 November 2015, Chen was confirmed as the running mate for Tsai Ing-wen in the 2016 Taiwanese presidential election after media speculation earlier in the month. During the campaign, Chen became known by the nickname Brother Da-jen (大仁哥), after a character portrayed by Chen Bolin on the romantic drama In Time with You. Chen is the first Catholic vice presidential nominee in Taiwan. On 16 January 2016, Tsai and Chen won the presidential election in a landslide. Chen took up his post as Vice President on 20 May 2016.

Chen Chien-jen is a devout Catholic. Chen and his wife were invited to visit the Vatican several times by Popes John Paul II, Benedict XVI, and Francis. He has been invested as a Knight of the Equestrian of the Holy Sepulchre of Jerusalem (2010) and a Knight of the Pontifical Equestrian Order of St. Gregory the Great (2013). He served on the board of trustees of Fu Jen Catholic University.

Chen served as Minister of Health from 2003 to 2005. As health minister, he was praised for effectively managing the SARS epidemic through quarantine and screening procedures, despite Taiwan's non-membership in the World Health Organization complicating the coordination of research efforts. His successor Hou Sheng-mao credited Chen with reforming the National Health Insurance program. Chen led the National Science Council from 2006 to 2008.

Chen obtained a master's degree in public health from the National Taiwan University, and received his Sc.D in human genetics and epidemiology from Johns Hopkins University in 1977 and 1982, respectively. He began his medical career by researching hepatitis B, and helped raise awareness about vaccination for the disease in Taiwan. Chen further researched on the liver cancer risk of people with hepatitis B. Chen also discovered a link from arsenic to blackfoot disease. The arsenic research lead to the revision of international health standards for arsenic exposure. Between 2011 and November 2015, Chen was a vice president of Academia Sinica.

Chen Chien-jen KSG KHS (Chinese: 陳建仁 , born 6 June 1951) is a Taiwanese epidemiologist and politician. He joined the Chen Shui-bian presidential administration in 2003 as leader of the Department of Health, serving through 2005. He later headed the National Science Council between 2006 and 2008. Chen then served as a vice president of Academia Sinica from 2011 to 2015. Later that year, Chen joined Tsai Ing-wen on the Democratic Progressive Party presidential ticket. He served one term as Vice President of the Republic of China, from 2016 to 2020.

Sir Chen Chien-jen was born at his family home in Cishan, Kaohsiung County, in 1951, as one of eight children. His father, Chen Hsin-an, served as Kaohsiung County Magistrate from 1954 to 1957. Chen's mother Chen Wei Lien-chih managed a daycare. Chen is married to Lo Fong-ping, whose family is from Nanjing.