What caused zombies in World War Z?

Related questions

1. Is World War Z split screen ps4?
2. Is World War za horror movie?
3. Is there going to be DLC for days gone?
4. Is World War Z worth playing solo?
5. What is the virus in World War Z?
6. What is the World War Z virus?
7. How did the virus in Walking Dead start?
8. Is World War Z on Amazon Prime?
9. What causes zombies in World War Z?
10. How many died in World War Z?

Tags

1. #likely
2. #world
3. #artifacts
4. #chinese
5. #scavenging
6. #start
7. #young
8. #zombie
9. #bitten
10. #submerged
11. #archeological
12. #however
13. #river
14. #under
15. #virus
16. #flood
17. #caused
18. #gorges
19. #water
20. #basin
21. #movie
22. #patient
23. #three