All inoculations are likely to have "side effects", some of which may resemble mild symptoms of the illness itself. Anaphylactic shock is a known occasional effect of inoculation and there have been reports of this in the case of at least the Pfizer vaccine. Other side effects have been reported, some being regarded as serious, including possible connections with death (not confirmed). I have seen these mentioned abroad more than in the UK, but then my experience is of much higher levels of transparency than in the UK (where things are more likely to remain hidden). I have no reason to doubt the reports which come through public/media briefings on statistics, trends, etc. I don't recall seeing anything leading to hospitalisation with Covid after inoculation but I have seen reports of examples where Covid was contracted "in spite of" inoculation against it.