調 [-]

Jyutping lau4 diu6
Pinyin liú diào

Definitions (Wiktionary)
  1. noun, neologism
    contact tracing; epidemiological investigation

流調 [-调]

Jyutping
Pinyin liú diào

Definitions (CC-CEDICT)
  1. epidemiological survey (abbr. for 流行病學調查|流行病学调查[liu2 xing2 bing4 xue2 diao4 cha2])