div class=trans-pagebutton class=gotoPage data-page=1Page 1button div class=trans-imagea href=https:reader040fdocumentsusreader040viewer20220205225750680d1a28ab0f07ae5e9ahtml5page1jpg target=_blank img data-url=documenta-two-stage-transfer-of-pathogenicity-between-the-mel-and-nws-strains-of-influenzahtmlpage=1 data-page=1 class=trans-thumb lazyload alt=Page 1: A Two-stage Transfer of Pathogenicity between the MEL and NWS Strains of Influenza A Virus loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mM8Uw8AAh0BTZud3BwAAAAASUVORK5CYII= data-src=https:reader040fdocumentsusreader040viewer20220205225750680d1a28ab0f07ae5e9ahtml5thumbnails1jpg width=140 height=200 adivp© Nature Publishing Group1958pdivdiv class=trans-pagebutton class=gotoPage data-page=2Page 2button div class=trans-imagea href=https:reader040fdocumentsusreader040viewer20220205225750680d1a28ab0f07ae5e9ahtml5page2jpg target=_blank img data-url=documenta-two-stage-transfer-of-pathogenicity-between-the-mel-and-nws-strains-of-influenzahtmlpage=2 data-page=2 class=trans-thumb lazyload alt=Page 2: A Two-stage Transfer of Pathogenicity between the MEL and NWS Strains of Influenza A Virus loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mM8Uw8AAh0BTZud3BwAAAAASUVORK5CYII= data-src=https:reader040fdocumentsusreader040viewer20220205225750680d1a28ab0f07ae5e9ahtml5thumbnails2jpg width=140 height=200 adivp© Nature Publishing Group1958pdiv