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. Author manuscript; available in PMC: 2023 May 30.
Published in final edited form as: Lancet Infect Dis. 2022 Apr 12;22(7):1021–1029. doi: 10.1016/S1473-3099(21)00812-4

Figure 3: Calculation of VE.

Figure 3:

Each cell (A–F) contains the number of infections that occurred within each corresponding vaccination category. The prevalence of gonorrhoea among the complete vaccination category is thus equal to A/A+B. VE=vaccine effectiveness. *Illustrates vaccine effectiveness calculations for 1) gonorrhoea compared with chlamydia and 2) gonorrhoea or chlamydia co-infection compared with chlamydia. †Vaccination status of the patient at the time of the specific gonorrhoea or chlamydia infection. ‡Adjusted for covariates and multiple infections per individual.