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AIBU?

Share your dilemmas and get honest opinions from other Mumsnetters.

To not want baby near unvaccinated toddler?

258 replies

victoriaspomge · 09/02/2026 21:53

So basically my partner wants his half brother's (same dad) younger half brother (same mum) to come and meet our baby.
He has a daughter who is 2 years old who he says is our kids cousin.

My partner is no relation to him or his daughter biologically but because they share a half brother he feels as if it's his brother as well and that they are family.

He dosent really know him and doesn't have his number and has only met him in the last 10 years.

They only hang out if it's with their mutual half brother.

I know the 'brother' is very anti vax and has not got his 2 year old vaccinated despite living in a city where it has had a lot of cases of measles.

Baby is too young to be have the MMR and I am extremely worried about my baby meeting this 2 year old.

AIBU to feel like this?

MonsteraDeliciosa · 10/02/2026 10:55

During the pandemic, approximately 100,000 NHS and social care staff were going to be sacked for not agreeing to have the covid vaccine trial.

Yeah, the measles vax is not a trial, though, it's a longstanding safe vaccination. A vaccination that had all but eradicated measles until idiots started refusing it.
The Anti-vaxxers are only to make the choice not to vaccinate their children because they're depending on everyone else vaccinating.

TaraC25 · 10/02/2026 10:56

This reply has been deleted

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Nice. Resorting to insults and bullying - classy!

TaraC25 · 10/02/2026 10:59

BoredZelda · 10/02/2026 10:50

Dr Steven James who had an issue with mass vaccination for NHS staff but said he was pro-vaccine for the groups who were at risk? Who chose not to have the vaccine for himself for his own reasons, but never said nobody should get it? Who has never spoken out against any other vaccine?

The “ICU doctor” who is largely now just touting his Weightloss programmes and £500 a session breathing classes?

He’s the guy you are basing your entire anti-vax stance on?

Good for him I say. Because the NHS doesn't pay well and it's not a great employer for staff morale, so if he has found a side hustle.. great!!

I'm not anti-vax. I'm pro-choice and anti-bullying!!

randomchap · 10/02/2026 11:03

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MonsteraDeliciosa · 10/02/2026 11:06

TaraC25 · 10/02/2026 10:56

Nice. Resorting to insults and bullying - classy!

You know what's not nice?

Risking the lives vulnerable people and children who can't have vaccines, or who had and have, unknowingly, lost immunity. Anti-vaxxers destroy herd immunity, and herd immunity protects those people.

Anti-vaxxers and their children are disease vectors and the more disease vectors you have, the more a disease can circulate. The more it circulates, the higher the risk of mutation which would render the vaccine less effective if not useless. Then EVERYONE is at risk again.

It's quite silly for an antivaxxer to say you should respect their choice as they respect yours. Nah, our choices, as vaxxers, protect them; their choices are bloody dangerous for society.

TaraC25 · 10/02/2026 11:09

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The insinuation is that my children are unvaccinated and in some way, suffering.

My childrens vaccine status and overall health has nothing to do with you, or anyone else.

Thechaseison71 · 10/02/2026 11:09

JerryTubs · 10/02/2026 10:10

It’s different when you know someone definitely isn’t vaccinated though I should think. You don’t usually know these things so therefore you aren’t faced with the choice.

How is it different? Youwould now any baby under a year old hasnt had mmr vaccine

APatternGrammar · 10/02/2026 11:12

Thechaseison71 · 10/02/2026 11:09

How is it different? Youwould now any baby under a year old hasnt had mmr vaccine

And you would hope that the rest of that baby’s family including older siblings are vaccinated — as most are, since they want the best for their children, so it’s a rational assumption to make.

Thechaseison71 · 10/02/2026 11:13

BoredZelda · 10/02/2026 10:25

You say this like it’s impossible. My daughter wasn’t around any other babies or toddlers before she was vaccinated. We don’t have any in our family and there was never a situation where it would happen.

There is no world where I would have introduced an unvaccinated toddler into our home before she was vaccinated.

What if it had been your own toddler who COULDNT have the vaccine? What do you do? Bung them into care for a year until the baby was vaccinated?

Thechaseison71 · 10/02/2026 11:17

APatternGrammar · 10/02/2026 11:12

And you would hope that the rest of that baby’s family including older siblings are vaccinated — as most are, since they want the best for their children, so it’s a rational assumption to make.

Hope but not know. And you dont take baby to supermarkets, school runs doctors surgery etc? What when you are queuing for their first lot of jabs at 2 months. How do you know every other child and sibling there has been vaccinated

randomchap · 10/02/2026 11:18

Thechaseison71 · 10/02/2026 11:17

Hope but not know. And you dont take baby to supermarkets, school runs doctors surgery etc? What when you are queuing for their first lot of jabs at 2 months. How do you know every other child and sibling there has been vaccinated

Edited

known risks vs unknown risks

try reading the thread

bruffin · 10/02/2026 11:20

RampantIvy · 10/02/2026 09:05

Having looked as statistics, there have been 957 confirmed measles cases in the last year. That's barely anything compared to the population of the UK.

957 cases more than there should have been Hmm

You are probably too young to have had measles. I have had it. It has affected my hearing and my eyesight.

Back in the day children used to have to stay in isolation hospitals if they caught measles.

You need to educate yourself.

I also had measles when i was 9. Measles depletes your immune system for 3 years. I hadweeks off school with chronic tonsillitis the following year. So bad they were removed when it was no longer fashionable to whip out tonsils.

Aluna · 10/02/2026 11:22

This is bizarre. If you don’t want to catch measles then you stay away from people with measles, their vaccination status is irrelevant.

Unless you think non-vaccination neutralises measles and makes it invisible?

Thechaseison71 · 10/02/2026 11:23

randomchap · 10/02/2026 11:18

known risks vs unknown risks

try reading the thread

I did read the thread thanks. But unless you stay in the house and go nowhere ubtil baby is 13 months then its the same risk. It only works for first children anyway as a vaccinated child can still pick up measles at school and bring home And an unvaccinted toddler who doesnt have measles is no higher risk that one that is vaccinated and doesnt have measles

randomchap · 10/02/2026 11:24

Aluna · 10/02/2026 11:22

This is bizarre. If you don’t want to catch measles then you stay away from people with measles, their vaccination status is irrelevant.

Unless you think non-vaccination neutralises measles and makes it invisible?

https://www.gov.uk/government/publications/national-measles-guidelines/measles-factsheet

A person with measles can spread the infection in the 4 days before they get the rash until 4 days after they develop their rash.

Measles factsheet

https://www.gov.uk/government/publications/national-measles-guidelines/measles-factsheet

MsCellophane26 · 10/02/2026 11:26

I think it's lovely that the half-brother feels all his half-siblings are part of a family, but I absolutely would not want my baby meeting a toddler who didn't have the MMR.

My DS got rubella from an unvaccinated toddler in nursery 25 years ago, when DS was 10 months, so before he was old enough to have the MMR.

Luckily it was a mild case for my DS, but I was so worried that he might pass it on to a pregnant woman who could have birth complications. And the fact that the unvaccinated child could easily have brought measles into the nursery rather than rubella, and caused significant damage.

As others have said, anti-vaxers need to understand that there are consequences for their beliefs.

randomchap · 10/02/2026 11:29

Aluna · 10/02/2026 11:22

This is bizarre. If you don’t want to catch measles then you stay away from people with measles, their vaccination status is irrelevant.

Unless you think non-vaccination neutralises measles and makes it invisible?

So now you know someone with the virus, but who hasn't developed the rash, can spread it. Does that change your opinion?

MrsBennetsPoorNervesAreBack · 10/02/2026 11:30

Why do so many posters keep saying that an unvaccinated toddler without measles is no less infectious than a vaccinated toddler without measles?

Surely they are aware that diseases can be highly contagious in the period before symptoms appear?

Why would you take the risk of knowingly exposing your baby to an unvaccinated toddler who is inevitably higher risk than a vaccinated one?

And tbh, why would you want your child around other adults who have shown themselves to be so negligent anyway?

Thechaseison71 · 10/02/2026 11:52

MrsBennetsPoorNervesAreBack · 10/02/2026 11:30

Why do so many posters keep saying that an unvaccinated toddler without measles is no less infectious than a vaccinated toddler without measles?

Surely they are aware that diseases can be highly contagious in the period before symptoms appear?

Why would you take the risk of knowingly exposing your baby to an unvaccinated toddler who is inevitably higher risk than a vaccinated one?

And tbh, why would you want your child around other adults who have shown themselves to be so negligent anyway?

I had measles as a 5 year old. It left me partially deaf. What was stopping me spreading it to my younger brothers before the rash comes out. You just dont know who might be carrying anything

However people canmot spread a virus they DO NOT HAVE. Its as simple as that. Whether vaccinated or not if you dobt actually have something then you cant spread it

randomchap · 10/02/2026 11:56

Thechaseison71 · 10/02/2026 11:52

I had measles as a 5 year old. It left me partially deaf. What was stopping me spreading it to my younger brothers before the rash comes out. You just dont know who might be carrying anything

However people canmot spread a virus they DO NOT HAVE. Its as simple as that. Whether vaccinated or not if you dobt actually have something then you cant spread it

Edited

And you're far less likely to have it if you're vaccinated. Therefore unvaccinated people are higher risk

Thechaseison71 · 10/02/2026 11:58

randomchap · 10/02/2026 11:56

And you're far less likely to have it if you're vaccinated. Therefore unvaccinated people are higher risk

Even so if you dont have it then you cant pass it on.

I didnt pass it on to my brothers. And one of them was too young to be vaccinated

randomchap · 10/02/2026 12:00

Thechaseison71 · 10/02/2026 11:58

Even so if you dont have it then you cant pass it on.

I didnt pass it on to my brothers. And one of them was too young to be vaccinated

Edited

It's about managing risks. Unvaccinated higher risk.

You went partially deaf, wouldn't you want to minimise the risk of that happening to others?

000ForFucksSake000 · 10/02/2026 12:01

If your baby is breastfed they will have your immunity.
You sound a bit unkind about your inlaws.
I don’t think there’s a huge risk. And I’m most definitely not an antivaxer.

HelenaWaiting · 10/02/2026 12:03

One of my brothers is blind due to childhood measles (pre the vaccine). In my view, vaccination should be mandatory and anti-vaxxers should do time. It's extreme antisocial behaviour. Don't let this child near your baby.

NeverSeenThatColourBlue · 10/02/2026 12:04

No way would I take that risk with my baby. I can't bear anti-vaxxers, the worst of the Dunning-Kruger effect.