Describe how the disease was spread through the Yambuku hospital.

Two months later, there is another outbreak of the Ebola virus in a district of Zaire called Bumba. Nearly twice as deadly as the Sudan strain, Ebola Zaire initially surfaces at the Yambuku Mission Hospital, where Belgian nuns are treating hundreds of villagers with the same five hypodermic syringes. The used syringes increase the infection rate by catastrophic proportions.