Blind coordination and frequency

People who are blind depend on their other senses to go on their day to day lives. Taste, odor, touch, sound, and even instinct, though you may argue the latter is not part of our senses.
Today I awoke with a cold, sore throat, runny nose, left ear full of pressure.
Now, to a normal person that’s nothing but annoying, but to a blind person it can be argued a cold is actually dangerous.
When a blind person is familiar with his surroundings, he doesn’t need a guide dog or any help to move around. For example, inside my house, I know where everything is, everyone is, what’s on the stove. From the sounds, scents, and the position of which the sound came from. I can tell when someone is talking to me while looking on the opposite direction, if my kids are standing or sitting…