Keep a Post-it note outside the front door which reads ‘wash hands before you touch anything’.
It acts as a reminder to everyone coming into the house.
When parcels are delivered instruct the driver again via a Post-it note — to leave them in the porch and I don’t touch them for three days (unless urgent). By then the virus will have died — coronavirus survives for 72 hours on hard surfaces. If do have to open a parcel, tip the contents onto the floor rather than letting the box touch furniture in the home. Then throw the outer packaging away and wash your hands.
As for laundry if left in a bag, with a date on it for three days any virus is deactivated before it goes into the wash as normal.