There are two known receptors for the vasoactive intestinal peptide (VIP) termed VPAC1 and VPAC2. These receptors bind both VIP and pituitary adenylate cyclase-activating polypeptide (PACAP) to some degree. Both receptors are members of the 7 transmembrane G protein-coupled receptor family. https://en.wikipedia.org/wiki/Vasoactive_intestinal_peptide_receptor Then... “Summary: RLF-100 blocks the COVID-19 Virus, prevents a cytokine storm, heals the lungs and improves blood oxygenation with a mortality reduction of oyver 90% in the most severe cases.”