Communicable Diseases Intelligence 2020 - Report on ...

The majority of viruses reacted in a similar manner to the reference and 2018 vaccine virus A/Michigan/45/2015 in HI assays using ferret antisera. In total, 21 A(H1)pdm09 viruses were inoculated into eggs for isolation of candidate vaccine strains. Of these, 19 (90%) were successfully isolated, all of which fell into subclade 6B.1. ................
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