My brother just had his first baby and it is the first grandson to my parents. My mother has had a history of bad allergies and constantly has a stuffy nose and a pack of tissues in her purse. She recently went to the doctor and the doctor signed a note stating that she has no infectious ailments to his knowledge after examination. My brother and sister-in-law have never let my mother hold or visit the baby in any manner. Is this reasonable in any way, and is there any risk to my mother merely visiting and holding this several week old baby?