A friend has a low blood cell count and tells me numbers like 6.0,what does that mean and what is bad,or low?

Answer 1

The problem here is that there are a few different blood cells and we don't know which one you are talking about.

Haemoglobin level of 6.0 g/dl is bad - it's low. It means anaemia

White cell count of 6.0 x 10^9/L is quite normal

Platelet count of 6.0 is very low! It means thrombocytopaenia.

I'd have to go look up what a red cell count of 6.0 means.