How to say "immunity" in Japanese

• 免疫めんえきCommon
  nounThe general term for immunity as the body's resistance to disease, and also for immunization; it is the common word of the three, so it is the safe default when you simply mean 'immunity'.
  うちの子供こどもはみな、はしかには免疫めんえきがある。↗

  All our children are immune to measles.
• 免疫性めんえきせい
  nounPresents immunity as an abstract property or quality; it is less common than 免疫, and for the ordinary sense of 'immunity' it is seldom the word you want — reach for 免疫 instead.
• 免疫力めんえきりょく
  nounImmune strength: immunity viewed as a power that can be stronger or weaker, rather than a plain concept; less common than 免疫, it fits when the level or robustness of resistance is the point.

Use 免疫 for immunity in general, including immunization; choose 免疫力 when the strength of one's immunity is the point; 免疫性 is a less common, abstract way of naming immunity as a quality.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

• 免疫めんえきimmunity
• 免疫性めんえきせいimmunity
• 免疫力めんえきりょくimmune strength