Table 5.

Examples of LRT symptoms in populations positive for HRVs

Study category (HRV frequency, %)	Age (years)
GP (24) (Andeweg et al., 1999)	0– >64
GP (3) (Glezen et al., 1971)	Mostly 0–11
Outpatient clinic (3) (Bloom et al., 1963)	Infants and young children
Cystic fibrosis (18) (Collinson et al., 1996)	Children and adults
Virus hunting (31) (Ketler et al., 1962)	0–7
Experimental (15) (Douglas et al., 1966b)	Adult
Hospitalized with bronchiolitis (21) (Andréoletti et al., 2000)	<1
Hospitalized (Stott et al., 1969)	0–10
Hospitalized with LRT illness (Aberle et al., 2005)	0–2
Hospitalized with LRT illness (Krilov et al., 1986)	0–155

GP, general practitioner visits; ILI, influenza-like illness; LRT, lower respiratory tract, illnesses include tracheobronchitis, bronchitis, bronchiolitis, laryngotracheobronchitis (croup) and pneumonia.