The Gam is more volume, but it seems to absorb more quickly, with less skin involvement for me. You must not use much med if it only takes you an hour. I use 20 grams per week. It takes about 2.5 hours to infuse.

No, I never do flu shots. I do keep a script of Tamiflu in the house, though. The IG itself is great for preventing infections.

Good luck.