It's awful for his mum - was she on warfarin or anything to thin her blood if it was a bit thick? riptide has it really. I had immense tiredness and a headache for 24 hours with the Oxford, no real problem; I'm often worse with my annual 'flu vaccine. OH, on the other hand, is still needing treatment 3 months after having the Pfizer vaccine and, quite frankly, I'm beginning to get worried about him he is sleeping so much because it really seems to have knocked him for 6. We all take our chances and hope. If you are older and/or vulnerable then you do the calculation. :(