Thinking aloud6 May 2020 18:24
Maybe I shouldn't post this, since I may want to buy even more, but I've topped up heavily today on the basis of what appears the science here. Sitting down the old fashioned way with pen and paper what came out for me was:
1. Interferon is a natural molecule in humans, is part of our anti-viral response, and should therefore be well tolerated when topped up.
2. Viruses have evolved ways to negate it. But NOT by becoming immune to it, but by suppressing its production. Therefore (a) there seems to be an evolutionary advantage to them in negating it, and (b) topping it up should have an effect.
3. In the LAB: it does work on MERS, SARS, and - NB - COVID-19.
4. In HUMANS: it "has been well tolerated and shown to upregulate lung antiviral defences". Also it: "improved lung function in patients with a cold or flu infection". We don't know more re Covid-19 only because that is as far as the testing has gone, with published results: not because it has been shown not to work. In fact there has been one limited human trial, in China, on a comparatively small sample, and not with interferon on its own. They themselves say the study has "several limitations". Therefore though the result is positive it cannot be conclusive: "Conclusions. Therapeutic regimens of IFN-a?+?lopinavir/ritonavir and IFN-a?+?lopinavir/ritonavir?+?ribavirin MIGHT be beneficial for treatment of COVID-19." [My capitals.]
On this basis, for me it would seem quite strange if it doesn't really work for real life Covid-19 patients. It is well tolerated, in the lab it works on all these viruses including Covid-19, in humans it has been shown effectual against other viruses, with limited evidence against Covid-19 also. For it not to work there would seem to have to be something unique about Covid-19. Though unlikely that is not impossible: but there are indications in both lab and humans so far, and they are that it is not so.
Finally: the chinese paper is quite technical, but here it is if anyone is up to giving us a better interpretation. Please! https://link.springer.com/article/10.1007/s00011-020-01342-0