Vaccination against the human papilloma virus, which causes most cervical cancers, began over a decade ago.
A Lancet review of 65 studies covering 60 million people showed a fall in HPV cases and in pre-cancerous growths.
Over decades, this should translate into a significant fall, and possible eradication, of the cancer they said.
Jo's Cervical Cancer Trust said the data should boost faith in the jab.
There are 3,200 cases of cervical cancer and 850 deaths from the disease each year.
The review covered studies in 14 high-income countries, including the UK. They looked at HPV rates, plus cases of genital warts and pre-cancerous cells in the cervix called CIN.
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