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Gardasil 9 seems to be the best available HPV vaccine. I guess the chewing gum is mainly intended for people who were already infected with some HPV strain before they got the vaccine, or where the vaccine didn't work (because it doesn't offer complete protection).

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>Gardasil 9 seems to be the best available HPV vaccine.

Only in high income countries. The 4-valent version is still the dominant version available worldwide.

For Gardasil 9, some lower income countries also use just a single dose rather than two, due to cost.

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