Keep in mind your tank is infected and that won't change if you don't deal with the problem. Any new fish you add are at risk. It is very likely you will lose more fish to this in the future. It also seems a bit unethical to put new fish into a tank that you know is infected with a disease and a painful death is not an unlikely scenario.
yes got it and once again thanks. I might not have worded my last email correctly. All fish (including the ones that we lost to this disease) were purchased at the same time. The blues appear to be fine for now and will be treated with medication. No one is being unethical here by purchasing new fish in an infected tank. We have a new quarantine tank going forward and have already started to cycle a new disease free tank. Regards!