^aVaccination coverage in 2016 of infants receiving at least 3 doses of tetanus and diphtheria containing vaccine by age 1 year: http://apps.who.int/gho/data/node.main.A827.

^bIncidence rates were determined for each country by dividing the cumulative cases reported to the World Health Organization from 2001 through 2016 by the sum of the mid-year populations from 2001 through 2016. Tetanus incidence data from North America group 1, Europe group 1, and Europe group 2 comprised approximately 6.93 billion person-years, 2.73 billion person-years, and 1.92 billion person-years, respectively.

^cUS Childhood and Adult Vaccinations: https://www.cdc.gov/vaccines/vpd/dtap-tdap-td/public/index.html. Canada Adult Vaccinations: https://www.canada.ca/en/public-health/services/vaccination-adults.html. Canada Childhood Vaccinations: https://www.canada.ca/en/public-health/services/immunization/vaccine-preventable-diseases/tetanus/prevention.html. Mexico Adult Vaccinations: Gutierrez-Robledo et al [27]. Mexico Childhood Vaccinations: https://www.cdc.gov/vaccines/schedules/downloads/child/binational-schedule-pr.pdf.

^dEurope Childhood and Adult Vaccinations: Weinberger [28], Lee [29].

^eRecommend individuals aged >60 years receive booster vaccination every 5 years.

^fFinland only reported tetanus incidence in 2015.

^gIn 2012, France recommended adult booster vaccinations every 10 years [26] and, by 2014, recommended booster vaccinations every 20 years except that individuals aged >60 years still receive booster vaccinations every 10 years (https://vaccine-schedule.ecdc.europa.eu/).

^hRecommend 1 booster vaccination at age 18–20 years. Individuals in Croatia aged >60 years also receive 1 booster vaccination. Dashed lines indicate that no routine adult booster vaccinations are recommended.