Table 3. Cumulative rates of acute respiratory infections per 100,000 population by disease and age, Castilla y León, Spain, seasons 2020/21 (n = 12,103 cases) and 2021/22 (n = 33,608 cases).

Disease	Season
	2020/21							2021/22
Age group (years)	0–4	5–14	15–24	25–44	45–64	65–74	≥ 75	0–4	5–14	15–24	25–44	45–64	65–74	≥ 75
All ARI	79,001	31,557	24,220	17,316	13,625	11,773	15,750	177,138	62,235	65,050	46,515	33,615	29,635	30,980
Acute nasopharyngitis (common cold)	23,477	6,501	1,428	1,379	853	756	856	41,221	9,025	6,079	4,291	3,218	3,108	3,100
Acute pharyngitis	3,504	3,191	2,277	1,670	1,269	1,270	1,297	8,506	5,771	7,147	3,731	2,830	3,371	2,310
Acute tonsillitis	2,965	1,182	2,156	846	233	89	56	6,528	2,140	5,516	1,643	377	299	82
Acute laryngitis and tracheitis	5,289	713	0	67	74	22	134	12,181	2,045	195	321	220	278	114
Acute upper respiratory infections of multiple and unspecified sites	23,301	6,062	2,605	1,607	986	938	1,034	46,656	9,696	7,612	3,958	2,926	3,012	2,836
Acute bronchitis and bronchiolitis	1,560	342	90	101	149	156	494	10,912	510	190	407	428	541	835
Pneumonias and bronchopneumonias	156	20	58	56	133	311	550	911	68	48	42	178	174	766
COVID-19 disease or COVID-19 pneumonia	12,559	11,545	14,296	10,389	8,948	7,250	9,177	29,085	28,359	33,098	28,861	21,165	15,593	16,806
Influenza caused by specified or unspecified influenza viruses	208	117	234	158	209	90	19	2,325	1,196	1,417	863	583	283	145
Other respiratory diseases	5,982	1,884	1,076	1,043	771	891	2,133	18,813	3,425	3,748	2,398	1,690	2,976	3,986