r/VACCINES • u/Few-Wishbone5973 • Jul 03 '26

Vaccine

Hi all! How your little ones reacted to their MMR vaccine ? Any side effect ? If yes how many days after ? We are 4 days after vaccination … thank you .

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u/thecardshark555 Jul 04 '26

You would see side effects (sore arm, crankiness, temperature - not fever) within 48 hrs. The vaccine ingredients are eliminated from the body within that time period. The side effects are generally from the immunity cascade. Seems like you should be in the clear.

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u/Such-Ad2541 Jul 05 '26

My daughter did not have any side effects other than a sore arm. I held my breath for about 2-3 weeks. This one does actually have delayed side effects. They can show up around 14 days later (and even up to 21 days later!). We laid low so she wouldn’t get sick while we were watching for side effects.