The 12-year-old has died in hospital after his life support was withdrawn following a legal battle.
Two doses are now given but experts say one shot is enough to give protection against cervical cancer.
The problems are reported to have impacted referrals from the NHS 111 helpline to out-of-hours GPs.
Other groups have reported higher protection, but the results are still seen as a triumph.
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Borrowing - which hit a record £22.3bn in October - cannot go on indefinitely, chancellor says.