M.A.
hello, M.! i can understand your concerns! i had a baby end of december while strep throat was going around my family. i had the worst case of it to the point where i had to go the hospital two days before delivery and was still on my antibiotics when i brought my son home. i have three other small children at home who, of course, wanted to touch, and hold and breathe all over the baby first thing. (they were still getting over their bugs too)
we put his bassinet in my husband and my room, so when he slept, we could close the door and not worry about the others getting to him. when he was being held, we had to wash our hands(dh and i) and the kids were not allowed to hold him or put their faces near his until they were better. everything we touched that baby would touch was washed first. if we went out anywhere we washed as soon as we got home.
we all had the nasty/cold flu going around and he got sick, but it wasn't as bad as all of us. i was told my breastmilk has antibodies to whatever i have had and that helps the baby's immune system fight off infection. he recovered fairly quickly as well. i had to nurse every hour to keep him hydrated because he was so congested he couldn't breathe to nurse. i put him in a bouncy seat to keep him more up right to help him too.
follow your instincts- take the precautions at home, and take him to the doctor if he starts to get sick.
congrats on your baby and i hope all goes well for you and baby!