My 2 cents:
The Russian Health System isn't really systema per se, but a folk tradition founded by this guy Porphiri Ivanov, who iirc lived for a loong time through incredible hardships. VV does this stuff himself, and here's an interesting thing - I've never known him to be sick, in the 5 years I've known him.
Regards medications for colds and flus antibiotics etc:
Well, the thing about antibiotics is that they put evolutionary pressure on the viruses they attack. This causes viruses to mutate. Thus we get new viruses such as SARS etc. When this book first came out, btw, SARS didn't exist, or wasn't generally known to.
I got the sense that he was arguing against over-reliance on medical tech - that the first line of defense should be a healthy lifestyle (however you define that - in his case, the fasting, dousing, excercises etc), as opposed to your doctor. That medicine and vaccines are no substitute for a healthy lifestyle, and the concominant increase in the effectiveness of your immune system. To counterpoint the curing SARS comment, ask an AIDS sufferer if medical technology is any substitute for the natural immune system.
How far this goes is another point to consider. When he says 'most' is he really, as a layperson, considering every known illness to humanity? Or is he saying that in most cases of people catching a flu or cold, there's no need to break out the antibiotics?
«Система» – это унифицированная методика обучения и воспитания в виде системы физических, психологических и духовных упражнений, которая может использоваться для обучения и воспитания любого человека вне зависимости от его пола, возраста, физического состояния, национальности, вероисповедания.