-typo: 1st sentence '... free of ...'
-A specificity control is missing: what is the effect of adding the glycan outside of the RBS with regards to liposome agglutination? Either carry out experiment, or discuss if data are available from the literature.
I would encourage the authors to use this section for further discussion of their findings. Of particular interest here is the implication of the results for virus assembly in cells. Or, can these results be used for testing liposome agglutination by other HA types, for examples from animal influenza viruses?