DS had freshers flu last month and came home on a visit after 2 weeks and still had a cold and sore throat. I suspect it was one thing after another. He was also supplied with strepsils etc before he left. We sent him back with multivitamins to hopefully boost himself back up.
Post wise we've sent a few things and have generally always turned up next day, except his replacement desperately wanted bank card of course which was posted first class on a Thursday and didn't turn up until the monday. I'd posted a parcel first class at the same time and it turned up on the Friday.
I've had a few Amazon things delivered directly to him and also a couple of Sainsburys shopping deliveries.
As for milk and bread, the flat apparently have a "system". I think they chuck a few quid in each week and they take turns to pick up when at the shops. DS also has a few spare cartons of long life milk for emergencies. It tastes fine but not great for cooking with.