The fifth time I was 27 and, by this stage, medical testing had come to a point where they could do scans to see why I was continually getting this illness. As it turned out, I had two holes in my skull arising from a benign bony tumour growing in my nasal cavity which had cracked my skull. It was thought that this had grown over many years and slowly but surely allowed a channel for the bug to move from where it can naturally live in the nasal cavity to the meningeal tissues. Again I recovered well from this bout and ended up having several operations to resolve both the tumour and the cracks to my skull so that I didn't get the illness again.
Since then, I haven't had any symptoms at all and, fingers crossed, will stay that way. I would say to people that, if there's ever a situation where you have the most dreadful headache with vomiting, get straight to the local A&E and get seen immediately. Take someone with you because, if you do have it, you can go downhill really really quickly – don't delay, take action and do it as soon as humanly possible.
I am living proof that you can suffer multiple times from the illness and still recover with no side effects – I put this down to prompt treatment and recognition of the symptoms.