Perhaps a defining characteristic of any cloud based solution is instant scalability. In an on premise architecture, a hospital will need to procure, configure and integrate new hardware to increase the capacity of the existing system. This is both costly and time consuming.
When the spiked workload subsides, the hospital is again stuck with additional hardware that is no more required. This is not the case if the hospital employs a cloud based solution. In times of high demand, the hospital can scale up the cloud solution in real time just by paying an additional usage fee.
Similarly, when the peak demand has been met, for instance in case of an outbreak, the hospital may not need the additionally procured resources. In that case, the hospital will simply scale the solution down to its requirement, which in turn will result in a reduction in the cloud usage fee.