I take it you did not see the fatality statistics for different ethnic groups in Singapore. They were on a thread here yesterday.
Unless you've seen much more demographic data on the Singapore cases than I have, I don't see how you can draw race or gender specific conclusions yet. I saw nothing on the ages of the Chinese victims, as compared to the non-Chinese victims. Ditto for ages on male and female victims.
If the nursing core are primarily younger females of non Chinese ancestry, and the older victims were primarily Chinese, that would skew the figures.