My DD's (14.5 months) had all 3 shots with her final booster to come.
When she first started having them the guidelines were to stagger them 1 month apart. As PP mentioned..the guidelines have changed as it's now considered to be safe to add them in conjunction with the other vaccinations.
I still chose to stagger them as my DD is prone to running low grade fevers as a side effect from the standard vaccinations on the Schedule so wasn't willing to risk it knowing that high grade fevers were a *possible* side effect of the Bexsero.
I also followed through with giving her a preventative dose of Panadol every 4 hrs for the first 24 hrs after the injection (then as required) in addition to the dose she had prior to the injection which is my normal protocol for her anyway when it comes to immunisations regardless of what they advise.
DD had the usual reaction where she was very sleepy for the first day or so followed by irritability & unsettledness, low grade fever & injection site nodule,redness & tenderness which is more or less par for the course with her anyway when it comes to immunisations & possible side effects.
I didn't have to purchase the vaccination from a chemist either as my GP Clinic's Nurses organised that. I'm pretty sure they already had stock in the fridge anyway?? Or else they just ordered it in. Either way...I didn't have to get a script & purchase it myself.