Investigation and Serologic Follow-Up of Contacts of an Early Confirmed Case-Patient with COVID-19, Washington, USA.

Chu VT, Freeman-Ponder B, Lindquist S, Spitters C, Kawakami V, Dyal JW, Clark S, Bruce H, Duchin JS, DeBolt C, Podczervinski S, D'Angeli M, Pettrone K, Zacks R, Vahey G, Holshue ML, Lang M, Burke RM, Rolfes MA, Marlow M, Midgley CM, Lu X, Lindstrom S, Hall AJ, Fry AM, Thornburg NJ, Gerber SI, Pillai SK, Biggs HM