It was the first day of the UK's rollout.
The British health regulator's now issued a warning that people with a history of 'significant' allergies shouldn't have the jab for now.
The MHRA's chief executive Dr June Raine says investigations are underway:
"We need to strengthen our advice now that we've had this experience in the vulnerable populations that groups have been selected as a priority, we need get that advice to the field, immediately."
