Contacts at 10-14 days, 6 weeks and 6 months were prioritised in Welsh Government guidance issued at various times during the waves of the pandemic.
Drwy gydol y pandemig cynghorwyd y byrddau iechyd i barhau i gynnal cysylltiadau yn 10 i 14 diwrnod oed, 6 wythnos oed a 6 mis oed.