Herewith I deposit my liturgical pamphlet for A Prayer for Aid Against the Plague (Remedium contra Pestem) (download from that link) and the accompanying Plague Cross.
For further reading, Don C. Skemer’s excellent short, illustrated academic essay ‘Deciphering a central European plague amulet’ in the Wellcome collection’s blog sheds a lot of light (even though, as we know, I remain resolutely resistant to the “code” metaphor for interpretation).