1 Understand that hepatitis B vaccination-induced protective antibodies can last for up to 15 years, but appear to fall off over time.  Patients who were vaccinated 10 to 15 years ago, especially those who were vaccinated as children, may not be adequately protected. For patients with this history who are at moderate to high risk of hepatitis B infection consider quantitative hepatitis B antibody measurement to determine protective immunity.
Definition of thickness. 1 : the smallest of three dimensions length, width, and thickness. 2 : the quality or state of being thick. 3a : viscous consistency boiled to the thickness of honeyb : the condition of being smoky, foul, or foggy. 4 : the thick part of something. 5 : concentration, density.
Definitions of commonly used thickness terms. Gauge: refers to the thickness of the film. Mils: standard term used to measure the thickness of film in thousands of an inch. In reference to thickness or gauge, is mils the same as millimeters or microns? No. The gauge or thickness of plastic film is expressed in thousands of an inch, said as mils. For example, .005 is said 5 mils. These are all different forms of measurement. One millimeter = .039 or 39 mils thick.