Weymouth, Portland and Chickerell young people are being offered jabs after April's cases in Dorset.
Alison Griffiths has called for greater protections after cases linked to Reading and Oxfordshire.
After a fourth case of meningitis B has been confirmed in Reading, BBC South's health correspondent Alastair Fee shares what you need to know.
Vaccine available from 1 June to eligible young people in Weymouth, Portland and Chickerell.
The UKHSA says the fourth case has links with the same wider social network as the others.
BBC South takes a closer look at the meningitis cases in the region and what you may need to be aware of.
Head of Meningitis Now wants to see a wider rollout after Oxfordshire sixth-form pupil's death.
Two people ill with meningitis in Reading have been confirmed as pupils at two schools
A college student has died and two people are being treated after cases of meningitis in Reading, Berkshire.
