Autoimmunity. The immune system is a complex set of organs, cells, proteins and other substances that function to prevent infection. Primary immunodeficiency diseases are characterized by abnormalities in specific components of the immune system that lead to an increased susceptibility to infection.
How to Measure Ounces. Ounces are a measurement of mass or weight, and as such, you should use a scale when measuring ounces for a recipe, experiment, or similar procedure. In contrast, fluid ounces are a measurement of volume, so they are measured in a different manner. Note that there are also ways to estimate mass in ounces if precision is not necessary, and if required, you can easily convert a few other units of measurement into ounces.
Fluid ounce and weight ounce. There are also different types of weight ounce. Following is a quote from the source shown below. An ounce can either be a measure of volume (in which case it is referred to as a fluid ounce) or a measure of weight (in which case it is referred to as a ounce weight). If the term ounce is used without specifying fluid or weight, it is generally assumed to be ounce weight.