Table. Demographics, investigation results, and clinical details of asymptomatic JEV-infected blood donor and recipients, Hong Kong, China, May‒July 2017*.

Variable	Donor	Packed red blood cell recipient (index patient)	Platelet recipient	Plasma recipient
Underlying disease	No history of disease, no recent travel to JEV-endemic regions outside Hong Kong; resides in JEV-endemic area Tin Shui Wai, Yuen Long	End-stage chronic obstructive pulmonary disease with lung transplantation, May 10	Acute myeloid leukemia post induction chemotherapy with cytarabine and daunorubicin	Intracranial hemorrhage
Blood donation or transfusion type, date	Blood donation, May 29	Packed red blood cell transfusion, June 22	Platelet transfusion, June 2	Plasma transfusion, June 20
Pretransfusion IgM serology result, date	Specimen not available	Serum negative, May 31	Serum negative, May 25	Specimen not available
Posttransfusion IgM serology result, date	Serum positive, July 22	CSF positive, July 11; serum positive, July 15 and 18	Serum positive, July 5 and 22	Specimen not available
JEV nucleic acid test, specimen type and result, date	Positive archived blood specimen	Positive blood sample, June 26 and 28; positive bronchoalveolar lavage, July 10	Negative plasma sample, July 22; negative urine sample, July 25	Specimen not available
Clinical symptoms	Asymptomatic	Fever and rash July 6 (14 d after transfusion), followed by decreased consciousness and myoclonic jerks; MRI showed typical appearance of T2 hyperintensity of bilateral thalami, substantia nigra, and medial temporal lobes	Asymptomatic	Unknown
Outcome	Full recovery	Died October 1, 2017	Full recovery	Died from respiratory failure 14 d after transfusion

*CSF, cerebrospinal fluid; JEV, Japanese encephalitis virus; MRI, magnetic resonance imaging.