Extended Data Fig. 3: Visual detection of influenza viruses in throat swab, food packaging and frozen belt fish samples using MARVE.
a, Origami papers designed to detect SARS-CoV-2, H1N1, H9N2 and H7N9. b, Photographs of origami papers detecting SARS-CoV-2 and influenza viruses in throat swab, food packaging, and frozen belt fish samples. c, GAR values of images in b. 5 μl SARS-CoV-2 (2,400 copies/μl) was dropped on page 1 of the origami paper. 5 μl TEprobes (3 nM), 5 μl urease (1 nM urease in 6 nM pullulan solution) and 5 μl colour indicator mixture (1 μl urea (2.5 M), 1 μl phenol red (1.25 mM) and 3 μl H2O) were separately loaded on page 2, 3 and 4, respectively, of the origami paper.
