Ernesto O. Domingo (born June 28, 1930) is a National Scientist of the Philippines and professor emeritus at the University of the Philippines College of Medicine at UP Manila.

His study has saved millions of individuals from life-threatening illnesses and decreased healthcare expenditures by identifying the preventive approach to liver cancer.

He has fought for the hepatitis vaccine to be made mandatory and available to all, as he is worried about the poor's access to health care.

He has also successfully advocated for a bill that provides annual fiscal assistance for neonatal hepatitis immunization by working closely with politicians.

[1] He has received the 2013 Ramon Magsaysay Award for his work.