Flow cytometry reveals that H5N1 vaccination elicits cross-reactive stem-directed antibodies from multiple ig heavy-chain lineages

James R R Whittle, Adam K. Wheatley, Lan Wu, Daniel Lingwood, Masaru Kanekiyo, Steven S. Ma, Sandeep R. Narpala, Hadi M. Yassine, Gregory M. Frank, Jonathan W. Yewdell, Julie E. Ledgerwood, Chih Jen Wei, Adrian B. McDermott, Barney S. Graham, Richard A. Koup, Gary J. Nabel