I noticed this same thing when I had an MRSA infection this past spring. After having the infection cut out of my leg, I had to clean and soak the wound 6 times per day with new gauze required each time. I used 3 large boxes by the time things were healed.
I think that not only should you stock up on as much of these types of supplies as possible, but you should also learn which of them you can “make” yourself, as well as what some viable alternatives might be.
It’s astounding, truly, how much you go through.