First set of shots

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My LO got his first set of shots yesterday and ran a fever of about 99.8 last night. It went away as of about 11pm last night and he didn’t have one all day. We’ve kept Tylenol in him (doctor approved and gave dosage) and now at 9pm he seems to have a fever and is fussy again.

How long did it take for your LO’s to stop being fussy and warm and be back to normal?