Surveillance Data

Type/subtype/lineage of samples analysed at the Centre

Results show the type/subtypes/lineages of viruses received by the Centre from laboratories in each country. Data are shown for samples collected during the month indicated for which the type/subtype have been determined by antigenic and/or genetic analysis at the Centre as of 1 June 2021.

Note: Subtyping is based on analysis of the HA and in some cases is confirmed by further analysis of NA.

Sample Subtypes for April 2021

Australasia subtype plot

Total samples received, 1 January - 30 April 2021



Australia subtype plot

To view data from previous years, please click below: