TY  - GEN
TI  - Update: influenza activity--United States, 1998-99 season
SN  - 0149-2195
PY  - 1999///0204
KW  - Humans
KW  - Influenza A virus
KW  - Influenza B virus
KW  - Influenza, Human
KW  - epidemiology
KW  - Seasons
KW  - United States
N1  - Publication Type: Journal Article
ER  -