The sample is usually drawn from a fingertip or a vein. The first is mostly used to determine blood sugar level, while the latter can be utilized for a wider range of diagnostics. There are several types of blood tests.
The most frequently requested examination is complete blood count which has two types: qualitative and quantitative examination of the sample.
A quantitative blood count provides information on the proportion of the different cells in the blood. The most important data are the number of white blood cells, red blood cells, the amount of hemoglobin, hematocrit and platelet numbers.
A qualitative blood count shows the proportions of the different types of white blood cells. This is important because certain illnesses change the usual proportions: in case of bacterial infection, the number of neutrofil granulocytes rises, while during a viral infection, there are more lymphocytes in the blood.