Table 1

Case counts from January to August presented by year, country, diagnosis, viral isolates and age groups

	Case counts per study year			Relative reduction (%)*
	2018	2019	2020	Relative reduction (%)*
Entire cohort	1340	1467	234	83
Country
Bolivia	53	23	19	50
Chile	315	376	24	93
Colombia	460	534	164	67
Uruguay	512	534	27	95
Admission diagnosis
Bronchiolitis	733	771	126	83
Pneumonia	308	378	45	87
Others	299	318	63	80
Viral isolate
RSV	474	596	45	92
Influenza	29	36	7	78
Age group
≤2 years of age	1065	1156	165	85
>2 years of age	275	311	69	76

*Relative percentage change between the 2020 case numbers and the average 2018/2019 case numbers.
RSV, respiratory syncytial virus.