Write-up: Information has been received from a physician concerning a male who, on an unspecified date, was vaccinated with a single dose of Zostavax (Oka/Merck). Vaccinations received on the same day included tetanus toxoid (manufacturer unknown) and influenza virus vaccine (unspecified) (manufacturer unknown). The physician reported that after receiving the vaccinations the patient''s hemoglobin levels dropped. The patient was sent to the hospital and admitted. There was no product quality complaint. Hemoglobin levels dropped was considered to be disabling. Additional information has been requested.