Is deliberate indifference to serious medical needs a violation of the Eighth Amendment?

"[D]eliberate indifference to serious medical needs of prisoners constitutes the unnecessary and wanton infliction of pain, proscribed by the Eighth Amendment." Estelle v. Gamble, 429 U.S. 97, 104-05 (1976) (internal citations, punctuation and quotation marks omitted). Plaintiff must show "deliberate indifference" to his "serious medical needs," id. at 104,

Page 4

which includes "both an objective standard -- that the deprivation was serious enough to constitute cruel and unusual punishment -- and a subjective standard -- deliberate indifference." Snow v. McDaniel, 681 F.3d 978, 982 (9th Cir. 2012), overruled in part on other grounds by Peralta v. Dillard, 744 F.3d 1076 (9th Cir. 2014) (en banc)..