Pablo DT Valenzuela (American Spanish: ['paßlo ßalen'swela]; born June 13, 1941) is a Chilean biochemist dedicated to biotechnology development.
He is known for his genetic studies of hepatitis viruses; participated as R&D Director in the discovery of hepatitis C virus and the invention of the world's first recombinant vaccine (against hepatitis B virus).
He is one of the cofounders of the biotechnology company Chiron Corporation and of Fundacion Ciencia para la Vida, a private non profit institution where he is currently working.