Aura, detecting diseases Options

hello, if from the aura you can know if someone is healthy or not, is there a type of color or frequency that can be used to detect AIDs for e.g?

Has anyone heard of this method of seeing an aura?
You stretch out your arms before you, and bend your wrists inwards so your palms are facing you with the fingertips almost touching each other about an inch apart.
Then, without focussing directly on anything in particular, you move your hands slowly up and down in opposite directions to each other against a blank background.
You should then see a kind of field moving between the fingers, usually pale against a dark background, and darker against a light background.
I don't know if this is useful for anything, but I found it interesting when I tried it.
Maybe it could help train the eyes for seeing auras, but I only got greys instead of colours.
Anyway, thought I'd post this, just for the record.
Steve.