○○○ Ebola ⪢⪢
Ebola is cause
d by six species of virus with four known to cause
sickness in humans and each is named after the locations of their outbreaks. The first known species was Zaire Ebola virus discovered in 1976 near Zaire's Ebola river.
○○○ pneumonia ⪢⪢
In December 2019, there was a cluster of pneumonia cases in China. Investigations found that it was cause
d by a previously unknown virus, now named the 2019 Novel Coronavirus.
○○○ 1054 ⪢⪢
This new rotating power-sharing agreement will be the root cause
for several generations' numerous internal wars that will exhaust and divide the Kievan Rus'.