I find it pretty amusing that the first time there is a written document with references at the end in support of anti-vax nutjobs, they jump all over it like it is some massive revelation and gotcha moment. It's almost like they were well aware that quack blog posts and conspiracy nuts ranting on bitchute aren't really evidence all along. 
It's also pretty amusing that anti-vaxxers have immediately decided that this one document with references at the end is obviously iron-clad proof of a global conspiracy (even if they don't actually read it or look at any of the references), but you know, the tens of thousands published medical papers and studies with references at the end aren't good enough.
In terms of the actual content, the author has designed the letter quite smartly knowing full well that the vast majority of conspiracy nuts won't read it, and the parts that they do read, they won't understand so will just accept what he has said is true. He starts off stating mostly accurate facts with good references to scientific studies about how COVID attacks almost every body system, causing widespread organ failure, to lure people in to thinking he knows what he is talking about. (But I thought it was just a flu? Or according to some, it doesn't even exist? So it is a deadly disease now that you think it suits your agenda? Gotcha.)
By the time he gets on to talking about treatments, he knows most of his audience won't be checking the references (if they ever did to begin with). For example, his reference for the statement that intubation is what kills these patients - https://www.nature.com/articles/pr2009174 - is a vaguely related paper published in 2009 that has absolutely nothing to do with COVID at all. Out of his three links for this statement - "The correct treatment for severe COVID-19 related sepsis is non-invasive ventilation, steroids, and antioxidant infusions" - only one of them talks about ventilation and clearly states that intubation is necessary. The rest of this section follows the same theme, with him either not referencing sections which are purely speculation, using references which do not support his claims as above, or in some cases, using references which actively disprove his claims, such as one of his references "supporting" ivermectin - https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7539925/ - which clearly states "The antiviral activity of ivermectin has not been consistently proven in vivo." (In vivo means in living organisms).
By the time we get to all the insane ramblings about it being a criminal conspiracy, the author has abandoned all pretense of providing credible references, instead linking a bunch of news articles, blog posts, and right wing conspiracy sites such as https://rightsfreedoms.wordpress.com and https://www.thelibertybeacon.com.
All in all, I give it 2/10 for accuracy of the content, but 10/10 for knowing his audience won't read, understand, or really even care about the accuracy of the content.
It's also pretty amusing that anti-vaxxers have immediately decided that this one document with references at the end is obviously iron-clad proof of a global conspiracy (even if they don't actually read it or look at any of the references), but you know, the tens of thousands published medical papers and studies with references at the end aren't good enough.
In terms of the actual content, the author has designed the letter quite smartly knowing full well that the vast majority of conspiracy nuts won't read it, and the parts that they do read, they won't understand so will just accept what he has said is true. He starts off stating mostly accurate facts with good references to scientific studies about how COVID attacks almost every body system, causing widespread organ failure, to lure people in to thinking he knows what he is talking about. (But I thought it was just a flu? Or according to some, it doesn't even exist? So it is a deadly disease now that you think it suits your agenda? Gotcha.)
By the time he gets on to talking about treatments, he knows most of his audience won't be checking the references (if they ever did to begin with). For example, his reference for the statement that intubation is what kills these patients - https://www.nature.com/articles/pr2009174 - is a vaguely related paper published in 2009 that has absolutely nothing to do with COVID at all. Out of his three links for this statement - "The correct treatment for severe COVID-19 related sepsis is non-invasive ventilation, steroids, and antioxidant infusions" - only one of them talks about ventilation and clearly states that intubation is necessary. The rest of this section follows the same theme, with him either not referencing sections which are purely speculation, using references which do not support his claims as above, or in some cases, using references which actively disprove his claims, such as one of his references "supporting" ivermectin - https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7539925/ - which clearly states "The antiviral activity of ivermectin has not been consistently proven in vivo." (In vivo means in living organisms).
By the time we get to all the insane ramblings about it being a criminal conspiracy, the author has abandoned all pretense of providing credible references, instead linking a bunch of news articles, blog posts, and right wing conspiracy sites such as https://rightsfreedoms.wordpress.com and https://www.thelibertybeacon.com.
All in all, I give it 2/10 for accuracy of the content, but 10/10 for knowing his audience won't read, understand, or really even care about the accuracy of the content.