hubieran sucumbido
-they/you had succumbed
Past perfect subjunctiveellos/ellas/ustedesconjugation ofsucumbir.

sucumbir

Lo que ocurre entonces es que las poblaciones crecen en aquellas áreas que de lo contrario hubieran sucumbido a las infecciones por malaria.
What happens then is that populations rise in those areas which otherwise would have succumbed to malarial infections.
Word of the Day
scarecrow