The world's deadliest virus

In Europe, thousands of Chickenheads began to fall from the skies in the 1970s, confusing and delighting foxes and other creatures. Why? They included a vaccine to combat the most deadly virus known to man; since the 1930s, a rabies pandemic had been ravaging Europe's wildlife populations, and people had been working to eradicate the virus permanently.
Lyssa, the mad-rage spirit of ancient Greece, inspired the name of the disease, which has been terrorizing people for at least 4,000 years. It has the power to transform both humans and animals into water-phobic zombies. Yet what fascinates me about Lyssa is not just how strange and dangerous its infection is, but also how tremendously adept it is at dodging our attention.