They are keeping watch for unusual/dangerous side effects both here in the UK and Europe. The usual process for any new drug/vaccine.

Here in the UK, Alison Astles, the sister of Neil Astles who died from a blood clot, spoke very eloquently urging people not to be put off from having the jab. She is a pharmacist and felt she had a responsibility to speak out "because, overall, we will save more lives by people having the vaccine than not".