Any decision to use GHK-Cu should include honest discussion about evidence gaps
Cao HY, Lian JN, Lin ZS, Zhu ZW, Wang H,Wang HY
Researchers should confirm that packaging meets USP Type I borosilicate glass specifications, which resist leaching and maintain solution integrity over the in-use period

You will also find the vaccination schedules for people who are moderately or severely immunocompromised in the Immunize.org standing orders templates for administration of COVID-19 vaccines: For ages 6 months through 11 years: www.immunize.org/wp-content/uploads/catg.d/p3140a.pdf mRNA vaccines for ages 12 years and older: www.immunize.org/wp-content/uploads/catg.d/p3140.pdf Protein subunit vaccine for ages 12 years and older: www.immunize.org/wp-content/uploads/catg.d/p3141.pdf In general, people who are moderately or severely immunocompromised and previously unvaccinated are recommended to receive a 2-dose (protein subunit) or 3-dose (mRNA) initial series of COVID-19 vaccine, with an additional dose 6 months later of any age-appropriate COVID-19 brand (minimum interval of 2 months for Nuvaxovid, Spikevax, or Comirnaty
213,214 The reduced transendothelial electrical resistance of cellular monolayer induced by irradiation could recover within 10 min