UNC Health Care Isolation Signs (new 2015) UNC Isolation Sign Changes Explained AIRBORNE HD5226 3.12.15 EX AIRBORNE HD5226 3.12.15 AIRBORNE-CONTACT HD 3.12.15 AIRBORNE-CONTACT HD4489 3.12.15 EX CONTACT HD5224 3.12.15 EX CONTACT HD5224 3.12.15 CONTACT-DROPLET HD 3.12.15 EX CONTACT-DROPLET HD 3.12.15 DROPLET HD 5225 3.12.15 EX DROPLET HD 5225 3.12.15 ENTERIC HDF2822 3.12.15 EX ENTERIC HDF2822 3.12.15