What is a "serious medical need" in medical malpractice cases?

"A medical need is serious if failure to treat it will result in significant injury or the unnecessary and wanton infliction of pain." Peralta v. Dillard, 744 F.3d 1076, 1081 (9th Cir. 2014) (citation and internal quotation marks omitted). "Indications that a plaintiff has a serious medical need include '[t]he existence of an injury that a reasonable doctor or patient would find important and worthy of comment or treatment; the presence of a medical condition that significantly affects an individual's daily activities; or the existence of chronic and substantial pain.'" Colwell v. Bannister, 763 F.3d 1060, 1066 (9th Cir. 2014).