EPIDEMIYa (yun. epidemia, az epi —dar, dar bayni va demos — khalq), dar mahalli muayyan az meyori mamuli ziyod pahn shudani yagon bemorii siroyatii odamro guyand. Rioya nashudani qoidahoi sanitari, mavjudiyati barangezandayu pahnkunandahoi bemori, sust budani kori tashkilothoi nigahdorii tandurusti va g. boisi paydoishi E. megardand. E. va rohhoi muboriza bo onro epidemiologiya meomuzad.