I think if you have PA you are automatically B12 deficient because you are missing the Instrinsic Factor which absorbs B12 from your food, but you can also be B12 deficient without having Pernicious Anaemia. It's a bit confusing. I just want to feel less tired all the time. And if I get any extra illness to cope with it makes the tiredness so much worse. Teetime the standard treatment is still only every 12 weeks, I wouldn't be worried about the injecting, it's just being sure to get hold of the right drugs and not something dodgy. There's so much in the media about diabetic awareness, cholesterol levels, etc, but very little public awareness of PA/B12 def.