Table 3.

Number of Events, Estimated Risk, Risk Ratios, Vaccine Effectiveness, and 95% Confidence Intervals Overall and by Time Since Vaccination With 1 Dose of Modified Vaccinia Ankara-Bavaria Nordic Vaccine Among Individuals Aged <50 Years

Time Since Vaccination, days	Unvaccinated		Vaccinated		Risk Ratio (95% CI)	VE (95% CI)
	Events	Risk Per 1000	Events	Risk Per 1000
Overall	22	5.58	14	3.00	0.54 (0.25 to 1.03)	46.3 (−3.4 to 75.4)
0–6	7	1.44	9	1.86	1.29 (0.48 to 3.93)	−29.2 (−292.8 to 51.9)
0–13	11	2.34	12	2.52	1.08 (0.44 to 2.52)	−7.8 (−151.7 to 56.0)
≥7	15	4.15	5	1.15	0.28 (0.06 to 0.79)	72.4 (20.9 to 94.4)
≥14	11	3.26	2	0.48	0.15 (0.00 to 0.59)	85.2 (41.1 to 100.0)

Abbreviations: CI, confidence interval; VE, vaccine effectiveness.