During the early stages, some memory loss can be observed. Tasks at work or in social settings will become a lot harder. Organization and planning skills will lessen significantly. In the middle stages, emotional and mental changes will begin to occur. People will be moody and confused. Sleep patterns will change as well as an increased risk of wandering. Controlling bowels and bladder may not be as easy. Patients in the late stages require 24 hour care. There will be very little short term memory, and people will not remember the people or things around them. People will not seem familiar anymore. Patients will have trouble doing things such as walking and eating. There will be terrible difficulty communicating. Their immune systems will not be as strong, so patients will be more succeptible to infections. Not everyone will have all of these symptoms, but these are the most common.