TY  - RPRT
TI  - Influenza--a new problem?
AU  - W G Laver
AU  - G D Kelly
PY  - 1999
DO  - 10.5694/j.1326-5377.1999.tb123774.x
UR  - https://pubmed.ncbi.nlm.nih.gov/10615357/
ID  - 10615357
ER  -