[tomkinstinch]

They may be withholding physical samples, but some sequence data appears to have been released[1(eight segments of the virus from one patient),2(sequences from the last ten years)]. Sequence data like this is helpful for genomic epidemiology—modeling how the virus evolves over time and across geographic regions, as well as for investigating the potential functional impact of mutations.

1. https://www.ncbi.nlm.nih.gov/nuccore/?term=Influenza+A+virus...)

2. https://www.ncbi.nlm.nih.gov/nuccore/?term=(%22H7N9%20subtyp...)

[vedtopkar]

It should be noted that the influenza virus has 8 segments, so those 8 released segments from a patient represent the entire flu genome.