With the Queen, it would not be the done thing to have a good blow of ones nose, grog up some phlegm or even sneeze in public. Can you imagine the tabloids splashing pictures of her all over their sordid, pathetic, front pages if she did.
No, the Queen did not give them a chance to do that, she did the wise thing and laid low, in a warm house by the fire, well away from the crowds that she would have to look happy with and smile sweetly to as they lined the path to the church bestowing upon her the inevitable flowers and gifts she did not want and can hear her say "well you can go if you like Phil and keep the peasants amused but I am staying in the warm by the fire"
No doubt these gifts and flowers that are given to her eventually finish up in hospitals, care homes and hospices in the area and many could save the Queen that trouble of redistributing them if they just sent them direct to these establishments instead.