For The acronym being composed in all-capitals, Every letter needs to be an Original letter, as in NASA. In cases like this, just the C and D are Preliminary letters. Because it would glimpse stupid to jot down "CoviD" or "CoViD" in case you wanted to treat "coronavirus" as two https://msmsolutions.com/sunrise-2027-why-its-time-to-embrace-the-next-generation-of-barcode-technology/