Immunization strategy worked.
Brown
L M
LM
D006787:Hospitals, Veterans; D006801:Humans; D007252:Influenza Vaccines / Q000627:therapeutic use*; D010044:Outpatient Clinics, Hospital / Q000458:organization & administration*; D011785:Quality Assurance, Health Care; D012495:San Francisco
D007252:Influenza Vaccines