Two viral strains (blue and green) infect the same cell in a pig. Their segmented genomes reassemble (reassort) creating a new (red) pandemic strain. This daughter strain contains genome segments from both parental strains.
Illustration ID: SWINE-FLU_reassort_3
Illustration size: 49.2 Mpixels (141 MB uncompressed) - 8192x6000 pixels (27.3x20 in / 69.4x50.8 cm at 300 ppi)