1. Someone with medical competency who can generate a cure.
2. Weapons and ammunition, and a manufacturing facility.
3. A secure underground living headquarters.
4. A diverse population, capable of reproducing.
5. An army that is willing and able to exterminate infected homo sapiens.
6. An impenetrable and reliable aquifer/renewable water source.
7. Technology that will make it possible to grow fresh, organic, non-gmo foods in an underground greenhouse.
8. Engineers, medics, machinists, orthodontists, farmers, linguists, scribes, and childcare providers.
9. A clothing facility.