What are some common diseases that hospital test blood and other bodily fluids for?

to the best of my knowledge what they test for is,,low blood count, low and high white and red blood cells, anaemia, high and low blood pressure, high cholesterol, diabetes, leukaemia, HIV, aids, std, and other transmitted diseases, pregnancy, any Chang's in hormone levels in woman to see if they are going though the change of life, drugs, and alcohol related testings, also to see if you have any blood infections, heart and lung disease, oxygen and air levels in your blood.