Per Jim Humble, the 6 and 6 protocol is to be used for illnesses that are not life threatening. Here's from Jim's most recent book:
How to Use Clara’s 6 and 6 Protocol
The following is Clara’s 6 and 6 Protocol using MMS. It is simple and
is intended for most conditions, such as the flu; colds; physical pains,
either immediate or chronic; and most other general illnesses, but not
incurable diseases, or really severe diseases such as pneumonia,
swine flu, cancer, HIV/AIDS, and other life threatening diseases. For
those, use Protocol 1000 or 2000..
Please note that this "protocol" that GJP has devised above is his own and not a G2C protocol, although it uses parts of it.