Table. Mycoplasma pneumoniae test activity, proportion of individuals with positive PCR tests and proportion admitted to the hospital, by age group and season, Denmark, 2015/16–2023/24 up to week 48 2023.

Age group (years)	Season	Total number of PCR tests	Individuals with a positive PCR		Individuals with a positive PCR admitted to the hospital
		n	n	%	n	%
0–5	2015/16	7,865	822	10.5	72	8.8
	2016/17	8,832	764	8.7	60	7.9
	2017/18	6,690	499	7.5	49	9.8
	2018/19	3,846	103	2.7	18	17.5
	2019/20	5,356	356	6.6	21	5.9
	2020/21	1,708	5	0.3	< 5	0
	2021/22	7,108	< 5	0	< 5	0
	2022/23	5,465	< 5	0	< 5	50.0
	2023/24a	2,985	204	6.8	24	11.8
6–12	2015/16	6,733	2,253	33.5	114	5.1
	2016/17	6,606	2,048	31.0	104	5.1
	2017/18	5,121	1,292	25.2	80	6.2
	2018/19	2,557	278	10.9	27	9.7
	2019/20	4,189	1,025	24.5	58	5.7
	2020/21	839	11	1.3	< 5	0.0
	2021/22	1,762	< 5	0.1	< 5	0.0
	2022/23	1,724	8	0.5	< 5	12.5
	2023/24a	2,349	914	38.9	64	7.0
13–18	2015/16	5,260	898	17.1	68	7.6
	2016/17	5,953	776	13.0	46	5.9
	2017/18	4,573	560	12.2	47	8.4
	2018/19	3,330	134	4.0	19	14.2
	2019/20	5,123	505	9.9	31	6.1
	2020/21	814	8	1.0	< 5	25.0
	2021/22	2,921	< 5	0	< 5	0
	2022/23	2,379	29	1.2	< 5	3.4
	2023/24a	3,101	492	15.9	35	7.1
19–39	2015/16	16,099	1,563	9.7	303	19.4
	2016/17	19,641	1,522	7.7	239	15.7
	2017/18	17,800	1,297	7.3	285	22.0
	2018/19	12,802	339	2.6	61	18.0
	2019/20	16,323	1,099	6.7	229	20.8
	2020/21	7,272	7	0.1	< 5	42.9
	2021/22	14,194	< 5	0	< 5	0
	2022/23	11,162	33	0.3	9	27.3
	2023/24a	8,428	683	8.1	131	19.2
40–75	2015/16	41,225	1,797	4.4	331	18.4
	2016/17	52,568	1,753	3.3	316	18.0
	2017/18	52,087	1,434	2.8	335	23.4
	2018/19	42,558	426	1.0	107	25.1
	2019/20	49,984	1,322	2.6	300	22.7
	2020/21	32,297	26	0.1	18	69.2
	2021/22	43,585	5	0	< 5	60.0
	2022/23	43,148	41	0.1	12	29.3
	2023/24a	25,931	837	3.2	161	19.2
> 75	2015/16	10,684	89	0.8	50	56.2
	2016/17	15,592	97	0.6	48	49.5
	2017/18	17,567	114	0.6	66	57.9
	2018/19	17,868	28	0.2	17	60.7
	2019/20	22,316	108	0.5	61	56.5
	2020/21	27,156	12	0	11	91.7
	2021/22	31,798	< 5	0	< 5	100.0
	2022/23	31,987	< 5	0	< 5	75.0
	2023/24a	15,168	65	0.4	31	47.7

^a A season in Denmark is from week 21 to week 20. Data collection for the ongoing season 2023/24 is not complete as the season is not finished; data were collected up to week 48.