TY  - RPRT
TI  - Decrease in effectiveness of routine surveillance of Haemophilus influenzae disease after introduction of conjugate vaccine: comparison of routine reporting with active surveillance system.
AU  - B Olowokure
AU  - J Hawker
AU  - I Blair
AU  - N Spencer
PY  - 2000
DO  - 10.1136/bmj.321.7263.731
UR  - https://pubmed.ncbi.nlm.nih.gov/10999903/
ID  - 10999903
ER  -