Andrea. A cryptic meme splashes the usually benign rock of Snohomish. HeraldNet.com (Snohomish: Sound Publishing). November 18, 2019 [December 15, 2019]
美国华盛顿州出现首个新型肺炎病例,州长表态. 观察者网. 2020-01-22 [2020-01-23]. (原始内容存档于2022-04-12). Snohomish County man has the United States’ first known case of Wuhan coronavirus