Acute Respiratory Tract Infections among Hospitalized Palestinian Patients (2011–2016): A Retrospective Study

Table 3

Frequency and incidence rates of respiratory tract infection-related hospitalization stratified by year.

Organism	Year
	2011	2012	2013	2014	2015	2016
	N (IR^a)	N (IR^a)	N (IR^a)	N (IR^a)	N (IR^a)	N (IR^a)
B. pertussis	36 (1.4)	158 (5.9)	16 (0.6)	21 (0.8)	42 (1.5)	51 (1.7)
Influenza A	111 (4.3)	622 (23.2)	827 (30.0)	97 (3.5)	744 (26.0)	1154 (39.3)
Influenza B	28 (1.1)	3 (0.1)	10 (0.4)	11 (0.4)	7 (0.2)	2 (0.1)
RSV	5 (0.2)	46 (1.7)	61 (2.2)	107 (3.8)	87 (3.0)	143 (4.9)
Enterovirus	0 (0.0)	1 (0.0)	0 (0.0)	1 (0.0)	4 (0.1)	3 (0.1)
Adenovirus	0 (0.0)	1 (0.0)	0 (0.0)	2 (0.1)	6 (0.2)	12 (0.4)
S. pneumoniae	0 (0.0)	0 (0.0)	0 (0.0)	1 (0.0)	0 (0.0)	2 (0.1)

^aIR: incidence rate (hospitalized patients per 10⁵ population). Population was calculated as the average annual population in the West Bank between 2011 and 2016 according to PCBS data.