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Figure 4. Sensitivity analysis: vaccine cost. Effect of a change
in Human papillomavirus (HPV) vaccine cost on the cost effectiveness
of vaccination compared with current practice under varying assumptions
of vaccine immunity. The triangles represent a vaccine that provides lifetime
immunity to high-risk types of HPV. The circles represent a vaccine that
requires booster shots every 10 years to remain effective (base-case assumption).
The hatches represent a vaccine that requires booster shots every 5 years
to remain effective. The dashed lines indicate the $50,000 and $100,000
per quality-adjusted life year cost-effectiveness thresholds. The base-case
value of $300 is indicated by the arrow.
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