Nakajima K, Desselberger U, Palese P
Nature. 1978 Jul 27;274(5669):334-9. doi: 10.1038/274334a0.
Comparison of the oligonucleotide maps of the RNAs of current human influenza (H1N1) virus isolates shows these strains to be much more closely related to viruses isolated in 1950 than to strains which circulated before or after that period.
对当前人类甲型流感(H1N1)病毒分离株RNA的寡核苷酸图谱比较显示,这些毒株与1950年分离出的病毒关系更为密切,而与该时期之前或之后传播的毒株关系较远。