Okay, Here is the latest from the Nurse "My wife"!
Ensure that when you take the walks that you turn the heat down in the house and open a few windows. When you get bask from walking you will be nice and warm so Leave the doors open for a few minutes to let a breeze go through the house.
This will kill the bacteria inside of the house which may be causing your colds to reoccur....
What can I say? She never has given me this kind of advice when I have a cold...Do you have something going on with my wife??? Hmmmm....
LOL
Regards,
B