My 13 month old baby was accidently given a double dose of Varicella vaccine at ONCE (was given ProQuad MMRV + another varicella vaccine) ...Autism and other health risk concerns.

[u/Frequent-Street1711]

I'm so stressed about this. Does anyone have any sound information or advice about if my baby will be alright with 2x the amount of varicella vaccine in him?

This morning, I took him in to have his 12-15 month vaccination of MMR and Varicella. It was supposed to be 2 separate shots But the nurse accidentally gave him a combined dose MMRV in one leg and Varicella in the other leg. which means he got a double dose of varicella. I've been freaking out and reading that varicella is linked to autism.

I already asked the doctor and they said he probably just has higher risk of the usual side effects such as fever, rash and possibly febrile seizure. I'd like to know if he has a higher chance of autism from this or other issues? What can I do about helping my poor baby at this point? Who should I contact to report this or what should I do about it? The dr had already reprimanded the administering nurse who violated the safety procedures. I'm in ventura County, California.

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[u/Canadianinlondon1991]

I understand it’s scary when these things happen. I truly hope you don’t get any side effects (fever rash or seizure).

HOWEVER

Vaccines do not cause autism. Full stop. That’s dangerous misinformation being spread from bad science. https://pubmed.ncbi.nlm.nih.gov/24814559/#:~:text=The%20cohort%20data%20revealed%20no,1.00%3B%2095%25%20CI%3A%200.93

[u/Frequent-Street1711 → u/Canadianinlondon1991]

Thank you, hearing this  helps. Mostly concerned due to the double amount of virus being in him and not knowing what,  if anything that might cause. 

[u/Canadianinlondon1991 → u/Frequent-Street1711]

No amount of vaccine can cause autism. The risk of side effects your dr. outlined are possible, however those are also side effects from a single dose of vaccine. In these cases I like to just be really really rational with the facts.

This study includes varicella vaccine double dosage: https://pmc.ncbi.nlm.nih.gov/articles/PMC6925972/

Hope that helps!

[u/Frequent-Street1711 → u/Canadianinlondon1991]

Thank you! Yes it does help. 

[u/setseed1234]

Vaccines. Do. Not. Cause. Autism. Period. https://publichealth.jhu.edu/2025/the-evidence-on-vaccines-and-autism

Administering an extra dose of a vaccine generally does not lead to serious adverse health events. https://pmc.ncbi.nlm.nih.gov/articles/PMC6925972/

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[u/Frequent-Street1711]

Here are two links to some of the studies on varicella I've read.  Do they mean much?

https://pmc.ncbi.nlm.nih.gov/articles/PMC10311578/

https://pubmed.ncbi.nlm.nih.gov/24982233/

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[u/Frequent-Street1711]

Can anyone find info on what amount of live virus is in vaccines vs natural exposure? Is it always just a small fraction of the amount that a natural exposure would give? I'm finding it hard to find info on specific amounts of virus.

 I'm hoping even though my baby was double dose varicella, it's still not even close to a natural exposure amount. But Info like this is all I can find ( it says varicella vaccine virus reproduced itself probably fewer than 20 times.  Sounds good but I'd like more specifics on amounts):

 https://www.chop.edu/vaccine-education-center/vaccine-details/varicella-vaccine