It is currently not clear how the individual became infected.
Hundreds of supporters joined a protest on Saturday in Palmdale, marching from the park where Fuller's body was found to the sheriff's station.
China's Center for Disease Control took to social media to reassure citizens that chances of catching the communicable disease were "extremely low."
When the steppe peoples entered Europe in a bid to leave the plague behind, they would have unwittingly introduced the bacterium to entirely new populations which had never encountered it.
Maybe early puberty is to blame.
A sacred ritual that involves exhuming and rewrapping the remains of relatives could be aiding the spread of the disease.
What is considered a medieval disease by many is still present in several African countries.