Meningitis B is a "big killer in the UK", according to a specialist from St Mary's Hospital in London.
Professor Simon Kroll has spoken about the possibility of a new vaccine against Meningitis B being available within the year.
Scientists have been working on the vaccine for more than a decade and preliminary approval has just been granted for the jab.
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Callum Young, who will now be 23, was last seen on August 27 last year at his home in Hylton Road.
Gunner Paul Ferguson was on leave from the Army when he died in the early hours of Sunday August 21.
Dutch International Darryl Janmaat left for Watford, USA's DeAndre Yedlin arrived from Spurs and Tim Krul left for a season's loan at Ajax.