When is it safe to take your new born out and about?

Stacey
My son is a week old, my MIL wants us to come over for a family dinner tomorrow. 
How long did you wait? I feel like it should be fine as long as I'm feeling up to it. I had a c-section and lost a lot of blood so it's taken a while to bounce back. 
I am also so paranoid of him getting sick. 
With so many virus's going around