Does anyone know how you prove a child under 16 has had Covid for a passe sanitaire when travelling to France. I have one child who is over 16 who has had Covid and has an NHS app so they should be straightforward enough but my DC2 is in the 12-15 age group that don't have an app so I've no idea how to prove they've already had Covid and I'd rather not pay for testing every couple of days if I don't have to because they've already had Covid. Many thanks