What is the test for a claim against a prison for deliberate indifference to health and safety?

The Eighth Amendment prohibits state actors from acting with deliberate indifference to an inmate's health or safety. See Farmer v. Brennan, 511 U.S. 825 (1994). A claim based on deliberate indifference to health or safety has two elements. First, an inmate must show he was "incarcerated under conditions posing a substantial risk of serious harm." Id. at 834. Second, the inmate must show he was injured as a result of a defendant's "deliberate indifference" to that risk. Id. Under the deliberate indifference standard, plaintiff must demonstrate prison officials knew he faced a substantial risk of serious harm and that they disregarded that risk by failing to take reasonable measures to abate it. Id. at 847.

IV. Defendant's Arguments and Analysis