Betty
                    
                    
                    
                    
                    
                    
                    
                        
                        
                        Hi, I can only offer one small suggestion.   Read as much as you can about "auto-immune diseases."   A lady on the internet said that we don't inherit diseases from our ancestors, we inherit their immune systems - good or bad.    (Also, put "polio" into a www-search, and see what info you can find.