Which is the best Covid vaccine in UK- Pfizer, Moderna or AstraZeneca?

Which is the best Covid vaccine in UK- Pfizer, Moderna or AstraZeneca?

Which is the best Covid vaccine in the United Kingdom? Which one you have taken Pfizer, Moderna or Oxford AstraZeneca? And is there any side effects of the vaccine which you have taken? Precautions to take, advice, suggestions on the vaccination process.

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