: He introduced the Brazilian rubber tree ( Hevea brasiliensis ) to Indochina, founding a multi-billion dollar industry.

Alexandre Yersin (1863–1943) was a Swiss-French physician and bacteriologist best known for co-discovering the bacillus responsible for the bubonic plague, later named Yersinia pestis in his honor. While his scientific contributions saved millions globally, his legacy is most deeply felt in Vietnam, where he lived for decades and is venerated as a national hero and humanitarian. Scientific Breakthroughs

: Working at the Pasteur Institute in Paris , he co-discovered the toxins for Diphtheria and Tetanus alongside Émile Roux.