While the largest known coronavirus outbreaks in the United States so far have occurred in densely packed cities, the case in Graham County highlights the risks of the global pandemic in rural communities. Arizona's 15 critical access hospitals are mostly Level IV or Level II trauma centers, meaning they don't typically have the equipment or staff to stabilize patients for long periods of time, according to Dr. Daniel Derksen, associate vice president for health equity, outreach and inter-professional activities at University of Arizona Health Sciences.