Table 2 Inclusion and exclusion criteria
From: Quantifying the direct secondary health care cost of seasonal influenza in England
Inclusion | Exclusion |
|---|---|
Non-elective admissions | None |
ICD-10 codes: J09–11 as a primary or secondary diagnosis | |
All age groups | |
Date range: September 2017 – March 2018 and September 2018 – March 2019 |