Ferretti G C, Frugoni G, Bertucci R
Minerva Med. 1980 Nov 3;71(43):3189-90.
From the autumn 1978 to the spring 1979 an epidemiological inquiry was set up concerning samplings of sera of 1648 adult of different ages and of both sexes. It was noticed a contemporaneous presence of A/Texas/1/77(H3N2) and A/USSR/90/77(H1N1) viruses; it was found a larger frequency of the last subtype in the individuals born after 1957. During the winter 1978/1979 it was also noticed an overlap of B influenza virus.
1978年秋至1979年春，针对1648名不同年龄和性别的成年人血清样本展开了一项流行病学调查。发现同时存在A/德州/1/77(H3N2)和A/苏联/90/77(H1N1)病毒；在1957年后出生的个体中发现后一种亚型的出现频率更高。1978/1979年冬季还发现了B型流感病毒的重叠情况。
