WORRIED Swindon patients received the wrong coronavirus vaccine after going for their second jab at the vaccination centre inside Steam Museum

The effects of having mixed doses is still being trialled but health experts say it should not cause problems.

Sandra Fitzpatrick gave the medic her card to show the first dose had been Pfizer but later learned the computer had recorded it as AstraZeneca, so she received that as her second dose instead.

The 68-year-old from Cheney Manor said: “I was anxious enough about Covid anyway so this did make me feel scared. I overheard the nurse chatting to a colleague who said they had made the same mistake once.

“I felt poorly the day after because of AstraZeneca side effects and feel fine now. I was worried because I didn’t know if the mixed vaccines would still work.

“A lot of my friends are going for their second jab soon and they are going to make sure they see the bottle to make sure they get the right one.”

Sandra contacted the Adver after reading about a similar mix-up at Great Western Hospital where a woman who received Pfizer instead of AstraZeneca was told this was the first time this had happened in the town.

GWH apologised for the mistake, will investigate how it happened to prevent future errors, and added that medics “do not anticipate any ill effects arising from this”.

Sandra added: “Reading about that did make me feel better.”

Patricia Williams of Rodbourne Cheney experienced the same issue months earlier. She had the AstraZeneca vaccine in January before being injected with Pfizer in March.

The 84-year-old was among the first group of people in the UK who could be immunised against coronavirus because of her age.

She said: “I forgot my card but I told them which vaccine I’d had before. When I got home, I looked at my new card and realised what had happened.

“I was told I should be alright but was till quite worried – ‘should’ is not definite – but feel fine now. I tried to speak to someone about how this mistake had been made but didn’t get a good answer.”

There is currently no indication that having different coronavirus vaccines makes the doses less protective or causes any side-effects.

And so far, only a small number of mix-ups have been reported out of more than 15 million second doses successfully given to patients around the UK since the rollout began.

Public Health England found that having one dose can reduce household transmission of the virus by up to 50 per cent. 

This is on top of the reduced risk of a vaccinated person developing symptomatic infection in the first place, which is around 60 to 65 per cent four weeks after one dose of either vaccine.

A separate study found that being fully vaccinated with both doses of a Covid-19 vaccine reduces the risk of transmission by as much as 54 per cent. 

A spokesman for the Bath and North Somerset, Swindon and Wiltshire Clinical Commissioning Group said: “We have carried out a thorough review of our records and people should continue to come forward for their jab, when invited.”