Once the virus hits a person's skin, it causes the person to experience massive fever and bleed as a result. Once the virus reaches the final stage, the victim becomes dry and pruny like a mummy. Rather then being killed, victims become like zombies, and feel everlasting pain. The disease is also highly contagious, and anyone who comes in contact with a victim will become infected as well.
Wano Country Arc
When Luffy began an uprising at Udon prison along with Chopper, Hyogoro, Kikunojo, Raizo, and Kawamatsu, Babanuki ordered the other prisoners to restrain the young pirate captain. Having had their wills broken by the Beasts Pirates, they regretfully obeyed. Daifugo then started shooting Excite Bullets into random prisoners, knowing they would eventually spread the virus to Luffy.
Luffy grabbed the prisoners and forced them into a big hug, contracting the virus on purpose as a sign of his promise to Tama to free them and the rest of Wano Country from Kaido's control. Seeing that his words were affecting the prisoners, Babanuki decided to finish it by using an Excitement Shell shot from his elephant's trunk to murder them all, but Luffy predicted this using his Kenbunshoku Haki and tied the trunk, causing the shell to explode inside the prison warden instead.
- The Mummy virus is somewhat similar to the Ebola Virus. Both make the affected bleed from the orifices and get high fever.
- ↑ 1.0 1.1 1.2 1.3 1.4 One Piece Manga — Vol. 94 Chapter 948 (p. 6-7), Daifugo infects the prisoners with Mummy.
- ↑ 2.0 2.1 2.2 2.3 One Piece Manga — Vol. 94 Chapter 949 (p. 7-9), Daifugo talks about the virus.