Selenium is a cofactor for the three thyroid hormone deiodinases, helping activate and then deactivate various thyroid hormones and their metabolites. Isolated selenium deficiency is now being investigated for its role in induction autoimmune reactions in thyroid gland in Hashimotos disease. However, in a case of combined iodine and selenium deficiency, selenium deficiency was shown to play a thyroid-protecting role. See also
Abundance of elements in Earths crust
ACES (nutritional supplement)
Selenium yeast

Notes
References
External links

Selenium at The Periodic Table of Videos (University of Nottingham)
National Institutes of Health page on Selenium
Assay Archived 2012-02-26 at the Wayback Machine
ATSDR – Toxicological Profile: Selenium
CDC – NIOSH Pocket Guide to Chemical Hazards
Peter van der Krogt elements site
If the SIRS criteria are negative, it is very unlikely the person has sepsis; if it is positive, there is just a moderate probability that the person has sepsis. According to SIRS, there were different levels of sepsis: sepsis, severe sepsis, and septic shock. The definition of SIRS is shown below:

SIRS is the presence of two or more of the following: abnormal body temperature, heart rate, respiratory rate, or blood gas, and white blood cell count. Sepsis is defined as SIRS in response to an infectious process. Severe sepsis is defined as sepsis with sepsis-induced organ dysfunction or tissue hypoperfusion (manifesting as hypotension, elevated lactate, or decreased urine output). Severe sepsis is an infectious disease state associated with multiple organ dysfunction syndrome (MODS)
Septic shock is severe sepsis plus persistently low blood pressure, despite the administration of intravenous fluids.In 2016 a new consensus was reached to replace screening by systemic inflammatory response syndrome (SIRS) with the sequential organ failure assessment (SOFA score) and the abbreviated version (qSOFA). The three criteria for the qSOFA score include a respiratory rate greater than or equal to 22 breaths per minute, systolic blood pressure 100 mmHg or less and altered mental status. Sepsis is suspected when 2 of the qSOFA criteria are met. The SOFA score was intended to be used in the intensive care unit (ICU) where it is administered upon admission to the ICU and then repeated every 48 hours, whereas the qSOFA could be used outside the ICU.