Table 3.

Studies of community-acquired pneumonia, including viral diagnostics

Year	Location	Methods	Age (years)	% Viral	Most common virus	Second most common virus
1993–1995	Spain [9]	Serology	54 ± 21	14	Influenza	RSV/PIV
1998–1999	England [12]	Serology	65 ± 20	23	Influenza	RSV
1998–2000	Japan [11]	Serology	>65	13	NA	NA
1996–2001	Spain [8]	Serology	68 ± 18	18	Influenza	PIV
200–2002	USA [36]	Serology	61	10	Influenza	RSV
2000–2002	Netherlands [7]	Culture, serology, PCR	>60	46	Coronavirus/rhinovirus	Influenza
2002–2004	Netherlands [6]	Culture, RT-PCR	64 ± 16	29	Influenza	Coronavirus
2003	Belgium [5]	Culture, serology	82 ± 7	30	Influenza	RSV
2003–2004	Spain [10]	Antigen, culture, RT-PCR	NA	23	Influenza	Rhinovirus/adenovirus