I'm sure there's a lot we don't know about the benefits of the sun.
There are simply too many pleiotropic effects of sun-light and -warmth, to be aware of them all: Mitochondrial endogenous melatonin synthesis (which isn't reached by supplementation), nitric oxide in the vascular system; microbiome, immune (beyond vitamin D), and neurotransmitters modulation - to name a few.
Terrible to get typhoid, that's a bad one. I'm glad you got over that. I never get fevers, so I'm jealous of your fevers are robust immune system, lol!
Well once in 25 years a singular 1-month lasting fever, I don't consider really that robust. I even had the illusion in youth of a really strong immunity, since I overcame so many onslaughts apparently without difficulties. However, all those infection (malarias, bilharzia, amoebae, tubercles, etc.) in reality all damaged almost all organ or metabolic systems. I got the repair bill not surprisingly around age 40, when resilience and endogenous repair usually declines.
Have you looked into nattokinase? I can't remember if that was on your list.
I do have clear mainstays in my supplements, with clear correlations to whole remissions. But there are too many, to give each a full trial on their own. Therefore, I copy the Ayurvedic approach, where a combination of low dosed mutually supportive extracts show greater synergistic effects, than high-doses of individual herbs. I do feel really different to many ME/CFS, who allegedly can feel differences in taking a new supplement within days. As I posted just the day before yesterday on phoenix rising:
For me, it was different, I never expected 1-day improvements, with my failing heart, lung, liver, kidneys, spleen, androgens, thyroid, glucose metabolism, etc.
I knew this damage had been done during decades, practically my whole life. And indeed thought the chance for repair, even a fraction of it in further decades, rather unlikely.
So I never expected quick results, though in retrospect some did occur. But I really don't immediately 'feel' any supplements. Except a few disturbing sleep, better taken in the morning.
Nothing more to lose, I persisted with my lifestyle changes and comprehensive supplementation. I did however track improvement or worsening of interventions with a many as possible lab-markers. But felt not much otherwise.
The remission of PAD took 7 years, PEMs a whole 10 years to subside. With all major body systems failing, it takes time, and addressing the whole of it, which 1 supplement simply can't (except in rare case, with much less involved).
The chronic diseases in my case were caused by a plethora of things, how could they ever resolve with an isolated agent? I'm just over-joyous that they did.
In such a case patience and persistence is key. Not felt, but improving blood-markers kept me on track for so many years.
Nattokinase I trialed low dose together with serrapeptase, papain and mainly bromelain. And, as with most individual nutrients, nothing isolated to report.
A post later (there on phoenix rising), I did mention the main nutrients, which did show surprising isolated effects. But neither of them would have been able to cause the strong synergy for such improbable remissions, as from PAD, COPD or PEMs.
I will have a virus when it's time to go, or I will catch one on the plane going. So I push my vacation to the very end of fall. I seem to always get sick around the last week of November so I know how long I have.
Despite my stunning success with vitamin C, I never succeeded to enthuse anyone about its high dose applications with active viral infections:
http://www.doctoryourself.com/titration.html - it seems just too otherworldly and inconvenient for most. To dose so many grams down to every 20 minutes, for overcoming viral infections. But it would work in most cases, once the aversion to ingest so much of an acidic powder during 1 day overcome. Thought, I should mention anyway.