Table 2.

Case fatality rates in infants and adolescents and young adults in the United States (2015–2018) [7, 18–20]

Year	Infants (< 1 year of age)	Adolescents (11–15 years of age)	Young adults (16–23 years of age)
2015	5.4%	25.0%	17.4%
2016	11.1%	12.5%	8.8%
2017	12.0%	25.0%	4.5%
2018	12.9%	0.0%	0.0%