Fortified foods contain vitamin D in the form of either D2 or, more commonly, D3, which is the type produced by human skin exposed to sunlight. Salmon, tuna, swordfish and mackerel are examples of fish whose flesh contains vitamin D, notes the NIH Office of Dietary Supplements.
Definition of Wassermann test. : a test for the detection of syphilis using the Wassermann reaction âcalled also Wassermann.
A titer test is a blood test that determines whether you have immunity to certain diseases by measuring your antibody level to those diseases. If you have had the disease in the past of have been vaccinated to it, your blood should show evidence of immunity through a positive titer, or antibody, level. GET STARTED.