COVID-19, ARDS, ACOVCS, MIS-C, KD, PMIS, TSS, MIS-A: Connecting the Alphabet?

Covid-19 has presented the world with a multitude of different clinical faces. To date their linkage eludes. This article attempts to establish linkage using recent research results regarding blood groups, clinical findings, cytokines, epidemiology, and the CD147 receptor, the orphan sister of ACE2. The role of the immune system controlled by the RAS and vitamin D is explored and recommendations ventured.