Table 2. Adjusted incidence rate of acute respiratory infections per 100,000 population by season and type of disease, Castilla y León, Spain, seasons 2020/21 (n = 12,103 cases) and 2021/22 (n = 33,608 cases).

Disease	Season		Fold increase
	2020/21	2021/22
All ARI	18,942	45,223	2.4
Acute nasopharyngitis (common cold)	2,164	5,314	2.5
Acute pharyngitis	1,684	3,822	2.3
Acute tonsillitis	662	1,402	2.1
Acute laryngitis and tracheitis	280	745	2.7
Acute upper respiratory infections of multiple and unspecified sites	2,362	5,452	2.3
Acute bronchitis and bronchiolitis	239	795	3.3
Pneumonias and bronchopneumonias	181	229	1.3
COVID-19 or COVID-19 pneumonia	9,909	23,573	2.4
Influenza caused by specified or unspecified influenza viruses	151	729	4.8
Other respiratory diseases	1,310	3,162	2.4

Rates have been adjusted for the Castilla y León population age groups.