Two vaccines protect against the main causes of meningitis and septicaemia.
Meningitis B, known as MenB, is the strain of bacteria behind the outbreak of cases in young people in Kent.
The MenB vaccine is recommended for babies aged eight weeks, followed by a second dose at 12 weeks and a booster at one year.
It was added to the UK NHS childhood immunisation programme for babies born on or after 1 July 2015.
The MenACWY vaccine offers protection against four types of bacteria that can cause meningitis – meningococcal groups A, C, W and Y.
Pupils in Year 11 are automatically offered the vaccine in school, with a second chance to have it again in Year 12, if they missed out the first time.
If you are aged 25 or under, at university for the first time and have not yet had the MenACWY vaccination, you can ask your GP for the vaccine.
The PHA said if your child missed a vaccination, contact your GP practice to book an appointment.
Generally, it takes a couple of weeks to get the fullest protection from a vaccine and some require booster doses.