Go through these in order and stop at the first one that applies. If you are reading this for someone else, answer for them.
Call emergency services if a baby:
During pregnancy, seek prompt medical advice after a known exposure to rubella, chickenpox, toxoplasmosis, parvovirus B19, syphilis, or another infection that may affect pregnancy.
Do not wait for symptoms, since infection can be silent.
Arrange same-day assessment for fever with a new rash, new genital blisters, or a noticeable reduction in fetal movement.
These symptoms do not necessarily mean a TORCH infection, but they should be assessed.
For a newborn or young infant, seek urgent medical care for poor feeding, worsening jaundice, unusual sleepiness, a new blistering or purple-spotted rash, fever, or repeated vomiting.
Routine follow-up is appropriate for concerns such as delayed speech, not responding consistently to sounds, unusual eye movements, poor growth, or missed developmental milestones.
These deserve assessment but are not usually emergencies.
Every sign above is quoted from the sofidex article on TORCH syndrome. If you are not sure, err upward — it is always reasonable to be checked.