Let me reiterate that there are old versions of The BHT Book all over the Internet. The so-far foolproof way to get the latest version is to go to the Steve page at the Project Wellbeing website and download it. This post on Earth Clinic is being made in 2022, and the latest version is 2021. But keep in mind that the book has been updated every 2-3 years since the paleozoic era [insert chuckle here], and you might be reading this in 2032, or 2132.
A few other altering factors are (1) that SARS-CoV-2 has been added to the list of lipid-enveloped viruses, (2) that C@v! D includes at-least-occasional neurological symptoms, and (3) that HPV, a non-enveloped virus, has had positive reports of benefit. So new information may be even more important than in past editions.