Table 1.

Proportion of the population who is immune to measles by different age groups with original seroprevalence data (2014) and elapsed time adjusted data (2018), and their contact-adjusted immunity levels in South Korea.

Age group (years)	Proportion of Immune
	Original (2014)	Shifted (2018)
0–2	0.63	0.62
3–5	0.99	0.93
6–11	0.98	1.00
12–14	0.86	0.98
15–19	0.79	0.87
20–29	0.93	0.85
30–39	0.96	0.96
40–49	0.97	0.96
≥50	1.00	1.00
Plain immunitya	0.92	0.92
Contact-adjusted immunityb	0.86	0.92

Information based on publicly available national data conducted by Korea Centers for Disease Control in 2014 [12].

^aPlain immunity was calculated by overall proportion of the population immune.

^bContact-adjusted immunity was calculated as in [18].