Researchers at Cardiff University say preventing a form of diabetes could become a reality, if trials prove successful.
It aims to slow - or stop - the destruction of insulin-making cells using a vaccine-type treatment.
In the UK, Type 1 diabetes is on the increase.
David Wood reports.
More top news
Carl Edwards and guests look back at the week's events in the latest edition of Newsweek Wales.
A Yellow Warning has been issued by the Met Office as gale force winds and showery rain affect areas across Wales.
Welcome to the Newsweek Quiz - where we'll be testing your knowledge from the last seven days of news here in Wales.