Respiratory droplets are spread most readily by coughing or sneezing. Becoming infected in this way usually requires direct and close (within 6 feet) contact with the ill person or animal.
How fast does the bubonic plague spread?
What is the incubation period for plague? A person usually becomes ill with bubonic plague 2 to 6 days after being infected. Someone exposed to Yersinia pestis through the air would become ill within 1 to 3 days. When bubonic plague is left untreated, plague bacteria can invade the bloodstream.
Is the bubonic plague going to spread?
New cases of the bubonic plague found in China are making headlines. But health experts say there's no chance a plague epidemic will strike again, as the plague is easily prevented and cured with antibiotics.