There are three main types of tests for testing the blood for HIV infection. These include tests to (a) detect antibodies; (b) identify HIV itself and estimate the number of HIV virus in the body; and (c) provide an estimate of the number of T cells in the blood. Of these three types, the most [...]

Some people have high sugar levels only at times of great stress, or during an illness. When tested at other times, they seem perfectly normal. This condition is called “prediabetes” or previous abnormality of glucose tolerance (PrevAGT). Everything may go back to normal, or the disease may crop up in a more serious form later. [...]

No discussion of respiration would be complete without considering the relationship of lung cancer and cigarette smoking. This modern world is a world of marvels. It is not a great exaggeration to class among these marvels the increase in cigarette smoking in the last half century or so. It is surprising that cigarettes have the [...]