Figure 1

Association between sudden infant death syndrome (SIDS) and immunisation coverage in the United States over time. A) Trends in mortality rates of sudden infant death syndrome (SIDS) and related diagnostic groups in the United States over time. Joinpoints indicate years with significant changes in SIDS mortality. B) Trends in immunisation coverage and infant sleep positions in the United States over time; sources: United States Immunisation Survey 1968–1978 for children aged 1–4 years and 1979–1985 for children aged 24–35 months [9], National Health Interview Survey 1991–1993 for children aged 19–35 months [23,24], National Immunisation Survey 1994–2009 for children aged 19–35 months[15,16], and National Infant Sleep Position Study 1992–2009 [28]. Abbreviations: DTP, diphtheria-pertussis-tetanus (including any acellular pertussis from 1995 onwards) [16]; Hib, Haemophilus influenzae type b; OPV, oral polio vaccine