Hi Missymiss and welcome to BB
Good on you for being a fantastic friend and wanting to be supportive and ensure you are helping

You need to avoid foods from the deli (like ham) as they may contain listeria...
as well as deli foods you also need to avoid
soft serve icecream
soft cheeses
raw meat or fish
some types of fish due to their mercury levels
Also no alcohol and limit caffeine
here is a link to some more information

Pregnancy and food safety | NSW Food Authority

I hope this helps