The The relationship between the WHO vaccine HA and NA sequences and those from Hong Kong and elsewhere can be seen even more clearly in Figures S3 and S4 when the 315 JCVI sequences are added to each tree. Although these contemporary JCVI sequences are mainly drawn from just three additional locations, they still represent the Northern hemisphere (New York, USA) and the Southern hemisphere (Western Australia and various locations in New Zealand). Again, for reference, the January Hong Kong HA and NA sequences from each year are again highlighted in red boxes.