From the Web site in the link Kaufman is a psychiatrist.

None of the published papers in his c.v. show any expertise in relevant areas of science and medicine. They include virology, immunology and and epidemiology.

He describes himself as a "natural healing consultant", rather than an "unnatural healing consultant".

In his Web site he poses the question "Did you know that in the modern era you are exposed to thousands of toxins each and every day?" and then asserts that "Your body is full of natural wisdom.", compared I assume to "unnatural wisdom"

Nothing in his Web site convinces me that he knows anything of importance about world-wide pandemic of Covid-19 infection and its consequences.