免疫力

• Reading: めんえきりょく
• Romaji: men'ekiryoku
• Kanji breakdown: 免 (exempt, escape) + 疫 (epidemic, plague) + 力 (power, strength) → immune power/strength
• Pronunciation: /meɴ.e.ki.ɾjo.ku/

Meaning

Immune system strength; the body's ability to fight off illness and infection.

免疫力 became one of the most discussed health terms in Japan, especially during and after the COVID-19 pandemic. The concept of 'boosting' one's 免疫力 through diet, exercise, sleep, and supplements drove massive consumer interest. Health shows, products, and supplements constantly reference 免疫力アップ (boosting immunity). While immunologists note that 'boosting' immunity is oversimplified, the term remains central to everyday health discussions.

Examples

1. コロナ以降、免疫力を上げることにみんな敏感になったよね。 Ever since COVID, everyone's become really conscious about boosting their immunity, right?
2. 免疫力アップにはちゃんと寝ることが一番だよ。 The best thing for boosting immunity is getting proper sleep.
3. 発酵食品は免疫力を高めるって言われてるよね。 Fermented foods are said to strengthen your immune system, right?

Usage Guide

Context: health, daily conversation, media

Tone: health-conscious, earnest

Do Say

• 免疫力上げたいなら腸内環境を整えるのが大事だよ。 (If you want to boost your immunity, improving your gut health is key.)
• 睡眠不足は免疫力をめっちゃ下げるらしい。 (Apparently sleep deprivation really lowers your immune function.)

Don't Say

• 「免疫力が高ければ病気にならない」は誤解 — 免疫力と無関係な病気も多い ('High immunity means you won't get sick' is a misconception — many illnesses are unrelated to immune function)

Common Mistakes

• Overusing 免疫力アップ as a marketing buzzword — immune function is complex and can't simply be 'boosted' by a single food or supplement

Origin & History

Compound of 免疫 (immunity; 免 = exempt + 疫 = epidemic) + 力 (power/strength). A medical term that became mainstream health vocabulary, especially amplified during the COVID-19 pandemic.

Cultural Context

Era: Long-standing term, massively amplified post-2020

Generation: All ages

Social background: Universal

Regional notes: Used across all of Japan. Post-COVID, 免疫力 became one of the most commonly referenced health concepts in Japanese media and marketing.