The apes and humans have supposedly been unaware of each other for the last two years. But the humans' generator activity (until they ran out of power and had to seek out the dam) and the apes' camp fires have been continuing during that time, and each should have been visible to the other group. See more
If you have a fever and cough or a sore throat, stay home.
Man on TV
I'd say 95% chance of this is manufactured. Came out of a laboratory.
The source of the virus was traced back to drug test done at Gen-Sys Laboratories in San Francisco.
Male Reporter 1
The lab technician, now known as Patient Zero, was accidentally exposed to retrovirus ALZ-113, an Alzheimer's trial drug that was being testing on chimpanzees.
Male Reporter 2
The infected chimps showed signs of erratic and aggressive behavior that led to their escape from...
After the credits there is an audio cue of Apes digging through, and removing rubble and concrete. Then Koba's distinctive breathing is heard, hinting at Koba surviving the fall after his struggle with Caesar. See more