Rose rosette virus has infected your rose. Besides reddened leaves and stems, disease symptoms include skinny (strapped) leaves, shoots crammed closely together (known as witch’s broom or rosette), super thorniness, distorted buds and flowers, and dead canes. Plant death is inevitable in 3-5 years. This virus is spread by mites the size of dust particles, carried on the breeze. An infected plant can host 40 times the normal population of these mites.