There is no predicting. But in the case of something like CHF, it is very important to guard from infection. What often happens is the cold that we shrug off is too much for the person in this condition.
Wash hands, especially after a trip to the grocery store or such, and spray doorknobs, phones, etc with lysol.
There was a nurse from Home Health Care here yesterday and she said mom's 1- yr. old granddaughter had to wash her hands & wear a mask when she visited. She also said they had no flu vaccine and mom would have to go out to get one. Why is it Krogers gets flu vaccine but the medical community doesn't have any?