Dtap (diphtheria, tetanus, and pertussis) vaccine - what you need to know: when to get help
Go through these in order and stop at the first one that applies. If you are reading this for someone else, answer for them.
1
Is any of this happening now?
Call 911
Call emergency services for signs of a severe allergic reaction, including trouble breathing, swelling of the face or throat, widespread hives, rapid heartbeat, severe dizziness, or collapse.
Other emergency signs, for anyone
Someone who is struggling to breathe, gasping, choking, or cannot get words out
Someone who has chest pain, tightness or pressure lasting more than a few minutes
Someone who has sudden weakness or drooping on one side of the face or body, slurred speech, or sudden confusion
Someone who is unconscious, or cannot be woken
Someone who is bleeding heavily and it will not stop with firm pressure
Someone who has had a seizure that will not stop, or does not wake up afterwards
Someone who has lips or skin that look pale, blue, grey or blotchy
Someone who you believe has taken an overdose or swallowed something poisonous
2
Is any of this happening?
Be seen today
Seek prompt medical advice if your child has a seizure, prolonged inconsolable crying, unusual weakness, reduced responsiveness, or a high or persistent fever.
The article also says
Contact the vaccination team if you have questions about the next dose or if redness, pain, or swelling worsens instead of improving.