くる病[kurubyou] rickets
アルツハイマー病[arutsuhaimaabyou] Alzheimer's disease
ケーソン病[keesonbyou] caisson disease
ハンセン病[hansenbyou] Hansen's disease
マレック病[marekkubyou] Marek's disease

悪病[akubyou] bad health
胃病[ibyou] stomach trouble
遺伝病[idenbyou] hereditary (genetic) disease
いもち病[tounetsubyou] rice blight
疫病神[yakubyougami] jinx (lit: god of pestilence)

罹患[rikan] contracting a disease
罹災[risai] suffering (from a calamity)
罹災者[risaisha] victims
罹災民[risaimin] victims

罹病[ribyou] contraction of a disease
罹る[kakaru] to suffer from
病気に罹る[byoukinikakaru] to contract a disease
罹患率[rikanritsu] disease rate