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Feel rubbish after flu vaccine

106 replies

EliJ90 · 07/10/2026 18:52

I’ve been having them for a few years and never even know I’ve had them!?

I had the flu vaccine on Monday afternoon, was nauseous Monday evening, diarrhea and fever yesterday and feel only slightly better today.

The leaflet lists all of these as ‘very common’ side effects but I’ve yet to meet anyone else needing to take time off work due to a vaccine.

anyone else struggling after this years vaccine?

OP posts:
Becs258 · 08/10/2026 20:17

This makes me feel a bit better as I had the flu one this morning and I’ve felt rubbish all afternoon , and my arm is agony. Thought I was just being a bit pathetic. But it’s definitely still better than flu!

KeepDancing1 · 08/10/2026 20:28

DangerousThingsILove · 08/10/2026 19:54

Your level of reactions sound really unusual. The flu jab can’t give you flu. It’s possible you may have picked up another infection/illness around the time you had the jab.

flu jabs are generally effective - and much better than having flu!

I’m exactly the same: both times I’ve had the jab, I’ve lost a fortnight and a stone, just like when I had flu in my teens. The first time, I accepted the explanation that it was a coincidence and I must have already been coming down with something - but it happened the next time in exactly the same way.

I think we’d have a fuller picture on reactions to vaccines if there was any interest in using the yellow card reporting scheme - but my surgery’s reaction was total disinterest when I reported it.

DangerousThingsILove · 08/10/2026 20:35

Sherararara · 08/10/2026 20:09

I never said it could give you flu. And there are numerous posts on this thread from people stating they have similar reactions.
so not unusual at all, in fact common. The only thing unusual is your comments.

Not really. In real life I don’t know anyone who has ever reacted to a flu vaccine, especially so violently. So uncommon.

Interested in this thread?

Then you might like threads about this subject:

Sherararara · 08/10/2026 20:37

DangerousThingsILove · 08/10/2026 20:35

Not really. In real life I don’t know anyone who has ever reacted to a flu vaccine, especially so violently. So uncommon.

🤣🤣🤣

AnTeallach · 09/10/2026 01:02

I'm reassured that others have also had a different reaction this year! I've had the flu jab for years and usually only have a sore arm afterwards. Had it midday on Monday and by the evening was shivering. I felt pretty unwell on Tuesday, with a headache, body aches, and was really tired. It took me until Wednesday lunchtime to feel properly better.

Negroany · 09/10/2026 02:04

Pinkbananaa · 08/10/2026 15:33

The flu nasal spray used in the UK is a live attenuated influenza vaccine (LAIV). It contains:
Weakened (attenuated) versions of influenza viruses — usually several strains selected for that year's flu season.
The viruses are weakened so they can stimulate immunity but are not expected to cause influenza in healthy people.
Small amounts of stabilisers and other manufacturing ingredients, which vary by brand.
It does not contain a needle or injectable material, and it does not contain a full-strength live flu virus.

Before berating anyone get your facts correct first.

We're talking about the injection, not the nasal spray, which I think is only used for children in the UK.

Ifeeltheneedtheneedforcoffee · 09/10/2026 07:14

Negroany · 09/10/2026 02:04

We're talking about the injection, not the nasal spray, which I think is only used for children in the UK.

Exactly i presumed the op is over 16 and therefore had the injection vaccine.
The nasal spray for most under 16s at school amd 2/3yr olds only contains a small amount of live vaccine.
My dc have all had theirs as well and are fine, they were more ill the 2nd week of school wjth back to school bugs

timeforachangenow · 09/10/2026 10:24

if you are over 50 and receiving a flu vaccination via the NHS, you may have had the vaccine containing the adjuvant squalene (designed to prompt a better immune response) this year, which may be why some people are noticing a stronger reaction. Each year there is a range of vaccines which are available and agreed for use for the NHS scheme so you may have received a different vaccine to someone else.

Lucyintheskywithnoidea · 09/10/2026 10:47

None of our team have had a reaction this year. A few that had planned to have it haven’t yet as they are off with a virus. If we had had the vaccine a week ago the symptoms would likely be blamed on the vaccination when actually they were already unwell.

@Middlemarch123 she’s a doctor? Of what?

mumumental · 09/10/2026 11:10

I had it last week and it was fine. Slightly sore arm for two days. I suppose you can catch Covid even in the queue.

HerbieFluffyDumpling · 09/10/2026 11:28

I had the flu vaccination last Saturday and I just had a slightly sore arm after, no other side effects. Just checked and I was given the Cell-based Trivalent Vaccine Seqirus.

I have mainly been fine with the vaccination, except one year when I had an upset stomach after, although that could have been a coincidence.

LadyWiddiothethird · 09/10/2026 11:33

Had my Covid and flu vaccines Monday,same arm.No reaction or sore arm,I usually get both!

CosiFannyTutte · 09/10/2026 11:51

I had the Covid jab last week. I had a really sore arm for two days afterwards; a raised lump that was both sore and itchy. Very weird.

I'm getting the flu jab next week.

MadisonAvenue · 09/10/2026 12:10

CosiFannyTutte · 09/10/2026 11:51

I had the Covid jab last week. I had a really sore arm for two days afterwards; a raised lump that was both sore and itchy. Very weird.

I'm getting the flu jab next week.

I’m not sure now which arm I had the Covid one in - I had both jabs last Saturday - but whichever I had in my left arm caused a raised area which was sore and itchy.

CosiFannyTutte · 09/10/2026 12:23

That was my arm after the Covid jab @MadisonAvenue !

LandSsmum · 09/10/2026 23:13

MellowSubmarine · 07/10/2026 22:35

Squalene isn’t in the standard flu jab. It is in the over 65s one though.

Interesting! I’m only 42. Wonder if I misunderstood or I just look ancient 😂

RationallyAngry · 09/10/2026 23:25

I had mine yesterday and have been absolutely fine. I’d even forgotten I’d had it until I noticed my arm was a bit sore.

I had real, proper flu once in my twenties. Was so ill. It floored me for about a month. Never risking that again.

Patriciastaser · 10/10/2026 10:55

People's perceptions of pain and illness vary though. One person's slightly sore arm may be another person's agony. Someone's slight headache and sore throat could be another person's full blown flu symptoms.

socialbatteryisdead · 10/10/2026 11:08

Sherararara · 07/10/2026 18:59

This is why I never have them.

A bit of nausea / diarrhoea for a day is better than getting flu. Also it could be a coincidence.
I had flu last year it floored me for 3 weeks.

socialbatteryisdead · 10/10/2026 11:13

ShakyBake · 07/10/2026 21:38

Old neighbour of ours had a yearly one religiously for 15 years and do you know what happened last year? She caught a cold and sneezed so hard she pulled a stomach muscle and was in hospital for 3 days. More trouble then they are worth

A cold is not flu.

socialbatteryisdead · 10/10/2026 11:15

Middlemarch123 · 07/10/2026 22:53

I always react badly after my vaccine, DD who’s a doctor says it’s the vaccine working. says you get a little bit of flu, to immunise against full blown flu. So I put up with the side effects for a few days. Had swine flu ten years ago, never felt so ill. Remember after ten days feeling lousy in bed going to GP, because I needed signing off work. Dr telling me that he’d had hundreds of patients saying they had flu, but I was one of the few who actually had it. Took me another month to recover. Side effects are horrible , but I can’t risk being that sick again.

Not true. A Dr of what?

CurlyKoalie · 10/10/2026 11:29

A vaccination is designed to make your body react so that you make the antibody against the real virus.
The vaccine and your reaction to it doesn't produce the cell damage that the real virus does, but some people's immune systems react so strongly that you do feel grotty for a few days with the non-cell damaging response.
It's a lot safer than exposing yourself to the real thing though.

Sherararara · 10/10/2026 13:18

socialbatteryisdead · 10/10/2026 11:08

A bit of nausea / diarrhoea for a day is better than getting flu. Also it could be a coincidence.
I had flu last year it floored me for 3 weeks.

Except I haven’t had flu in decades vs a guaranteed adverse reaction to the vaccine each year. And it’s a more than “a bit of nausea and diarrhoea for a day”. Keep your ignorant comments to yourself.

PinkWaffleMaker · 10/10/2026 19:14

CurlyKoalie · 10/10/2026 11:29

A vaccination is designed to make your body react so that you make the antibody against the real virus.
The vaccine and your reaction to it doesn't produce the cell damage that the real virus does, but some people's immune systems react so strongly that you do feel grotty for a few days with the non-cell damaging response.
It's a lot safer than exposing yourself to the real thing though.

Generally I would agree but with the flu vaccine that’s is often less than 50% effective in adults and needs to be taken every year I’m included to skip the few days feeling rubbish post vaccine and take the very low chance of actually getting ill with the flu.

Wolfiefan · 11/10/2026 12:29

Totally your choice. I haven’t found the vaccine guaranteed to make me feel rubbish. I also have asthma and am immunocompromised. I’m not prepared to risk it.