of Grigori Grabovoi's individual state registration certificate 21 September 2015 by the Business Registration Agency of the Republic of Serbia”. He notes that he is currently selling PRK-1U - "concentration-building devices" that are claimed to be able to stop aging and start rejuvenation, and treat HIV and cancer. Saburova notes that the price is €9,700 (with delivery) or €1,212 (in the case of remote access) ”(prices valid in May 2021), and also suggests that “for those who do not know how and where to use the equipment, the 'healer' is ready to explain the principle of the magical mechanism within the webinars, for a fee...". The designation PRK-1U means "universal development education facility for the concentration of eternal life”. It is claimed to be a "quantum device" with optical systems, which "significantly accelerates the development of consciousness through the concentration of ideas". The device is claimed to operate on the principle that an idea has a certain physical activity, and this activity then allegedly acts as a "biosignal", which optically interacts with the PRK-1U, becomes amplified and then "materializes". To increase the effectiveness of the educational program accompanying the PRK-1U device, Grabovoi recommends focusing on certain number series. Grabovoi numbers Olga Saburova also drew attention to Grabovoi's Facebook page where he is once again promoting his ideas of "treating any disease", including COVID-19 based on ideas from his 1999 book "Restoring the Human Body by Focusing on Numbers", in which he states that “every disease of an individual is a deviation from the normal cells, organs or the whole organism as a whole. The treatment of the disease then means a return to the norm", which can be achieved with the help of two numerical series invented by him - 4986489 and 548748978. In addition, journalists from the TV show Man and Law reported that Grabovoi used the social network TikTok to support these ideas. These and other "miracle codes" have been appearing since 2016 on Pinterest; books on codes could be purchased on Amazon as early as 2011 and in February 2020 the tabloid Daily Star mentions Hong Kong actor Julian Cheung, who wrote such a number on his forearm and called it a "code for epidemic prevention". Cheung's fans then began to imitate him, and the practice began to spread quickly through the Weibo social network. These "codes" began to spread on other social networks using the hashtags