I did get the Oxford one on Friday morning, didn't fell any worse than normal apart from a bit of arm ache for the rest of the day. Didn't get a lot of sleep Friday night and was awake pretty early and I felt horrendous. Bad head, feeling sick, aching, no energy, everything you get with bad flu. Got gradually better throughout the day after taking a few tablets and spent last night with an aching arm. Not that bad today, just lacking a bit of energy. Hopefully worth it. Been told the side effects are worse after the second dose.