Salk, Jo‧nas /sɔːk, sɔːlk, ˈdʒəʊnəs/
(1914–95) a US scientist who produced the first successful
vaccine (=a substance that is put into a person's body to protect them from a disease) against
polio (=a serious disease that damages muscles permanently) [TahlilGaran] Dictionary of Contemporary English ▲