(A)H1N1 ...

Immunosuppressed patients — Severely immunosuppressed patients (eg, those receiving treatment for malignancies, hematopoietic or solid organ transplant recipients) with influenza infection may not have a fever or other typical signs and symptoms; if such patients present with an acute respiratory illness, influenza should be suspected [17]. During the current pandemic period, antiviral therapy should be started as soon as possible and respiratory specimens should be sent for real-time reverse transcriptase PCR.

Great ... just great ...