Table 1.

Transfusion-Based Transmission Cluster Categories and Definitions for Recipients of a Dengue Virus (DENV) RNA–Positive Donation

Transmission Category	Recipient Status
	Before Transfusion	After Transfusion
Probable	DENV RNA negative and IgM negative, or data not available	DENV RNA positive
Possible	DENV RNA negative and IgM negative	DENV RNA negative and IgM positive
Nontransmission	DENV RNA negative and IgM negative, or data not available	DENV RNA negative and IgM negative
Inconclusive	Data not available	DENV RNA negative and IgM positive
Recently exposed not susceptible	DENV RNA positive or IgM positive	IgM positivea

Abbreviation: IgM, immunoglobulin M.

^a Immediately after transfusion.