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Source and license notes supplied with these plates. Plate inclusion does not add a study to the review or change its evidence rating.

SOURCES — long-covid-viral-persistence (Track 2, academic)

All raster imagery is openly licensed: CC0 or CC-BY only. No CC BY-SA, no non-open figures. PDB atomic coordinates are public domain (RCSB Protein Data Bank) and were rendered for these graphics with a self-written matplotlib C-alpha trace renderer (infographics-build/render_pdb.py). No micrograph was fabricated.

Kept

1. SARS-CoV-2 virions, colorized transmission electron micrograph
2. Source: Wikimedia Commons, File:Novel Coronavirus SARS-CoV-2.jpg
3. Authors: NIAID-RML (2020-02-12).
4. License: CC BY 2.0.
5. Used in: long-covid-viral-persistence-molecular-cascade.png, panel 1.

6. Attribution line on graphic: "NIAID-RML (2020) · Wikimedia Commons · CC BY 2.0"

7. SARS-CoV-2 virions, scanning electron micrograph

8. Source: Wikimedia Commons, File:SARS-CoV-2 scanning electron microscope image.jpg
9. Authors: NIAID (2020).
10. License: CC BY 2.0.
11. Used in: long-covid-viral-persistence-molecular-cascade.png, panel 2.

12. Attribution line on graphic: "NIAID (2020) · Wikimedia Commons · CC BY 2.0"

13. Cells infected with SARS-CoV-2 (SEM)

14. Source: Wikimedia Commons, File:Cells infected with SARS-CoV-2.jpg
15. Authors: NIAID (2020-05-07). A cluster of CCL-81 cells infected with SARS-CoV-2.
16. License: CC BY 2.0.
17. Used in: long-covid-viral-persistence-cellular-scene.png, panel 1.

18. Attribution line on graphic: "NIAID (2020) · Wikimedia Commons · CC BY 2.0"

19. PDB 6VXX — SARS-CoV-2 spike glycoprotein, chain A

20. Source: RCSB Protein Data Bank, entry 6VXX (Walls et al., cryo-EM structure of the SARS-CoV-2 spike glycoprotein).
21. License: public-domain coordinates.
22. Used in: long-covid-viral-persistence-molecular-cascade.png, panel 3 (single protomer).
23. Attribution line on graphic: "PDB 6VXX · public-domain coordinates, rendered for this graphic"

Rejected

• Frontiers in Immunology 2025, DOI 10.3389/fimmu.2025.1642250 (PMCID PMC12454094) (CC BY) — rejected: figures show autoantibody assays, not viral persistence in tissue.
• Gaebler et al., Nature 2021 (gut biopsy persistence figures) — rejected: not open access.

Imagery gaps

• No openly licensed (CC0/CC-BY) tissue-level image of persistent SARS-CoV-2 in human gut or other tissue was found; the cellular panel therefore shows real infection in cell culture (clearly captioned as such) rather than a human persistence biopsy.