This doesn't sound good, they are saying these fleas that carry the plague are becoming resistant to the insecticides that is used to control them. This disease can kill up to 60% of the people that catch it. Fortunately, at least now anyway, antibiotics can cure it if caught early. Of course in developing countries antibiotics might not be readily available and in countries where its expensive to see a doctor people might put it off until its too late. In both scenarios more fleas could be infected to spread it even further.If you thought the film Contagion was frightening, this medical plot twist may scare you even more—because it’s real.
Sign of the Apocalypse? Plague Is Back, With a Disturbing Twist - Yahoo News
Back when I had dogs and cats I noticed it was getting harder to control the fleas on them. Could have been because I lived in the country but still I kept after them using all sorts of products.