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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?

NotnowMildrid · 10/02/2026 12:26

YANBU
You are absolutely right to be concerned.
Your job is to protect your baby first and foremost.

randomchap · 10/02/2026 12:22

This reply has been deleted

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randomchap · 10/02/2026 12:20

TaraC25 · 10/02/2026 12:07

Do you leave the house?

It's quite irrational to think in that way... The risk is so minimal and I'm sure the PPs parents see that it could've been so much worse.

The risk of vaccines is even more minimal. Take the lowest risk for your child

Weeklyreport · 10/02/2026 12:14

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.

While breastfeeding does pass on immunity it is not 100% so the baby can still be at risk of catching viruses.

Thechaseison71 · 10/02/2026 12:13

randomchap · 10/02/2026 12:00

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?

Well of course. But theres nothing i( or my parents) couldve done differently. Unless they didnt send me to school

GETTINGLIKEMYMOTHER · 10/02/2026 12:11

Namenamchange · 09/02/2026 22:21

Yanbu, but you sound very judgemental and superior, maybe leave all that out and stick to the vaccinated part. However you are setting a precedent which you should then stick too

So what’s wrong with being judgemental about people who are stupid and easily influenced by idiots on the internet, to get their young children vaccinated?

Anyone with any sense would be equally judgemental, when it comes to the health of their own baby too young to be vaccinated.

TaraC25 · 10/02/2026 12:10

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.

A friends daughter went blind because she caught her eye on a coat hook at school - really really unfortunate freak accident. Just to make the point that unfortunate luck can happen to anyone; vaccinated or not.

The fact any human can think a government should have rights over another human beings body, is utterly insane.

I meet people in theirs 90s that decline the flu vaccine every year. Not everyone is a follower. Should they go to prison too?

TaraC25 · 10/02/2026 12:07

randomchap · 10/02/2026 12:00

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?

Do you leave the house?

It's quite irrational to think in that way... The risk is so minimal and I'm sure the PPs parents see that it could've been so much worse.

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.

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.

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.

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?

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 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 11:52

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

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?

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?

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 11:24

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

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

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?

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.

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

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

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?