J Hyg (Lond). 1977 Apr;78(2):223-33.
The surveillance programme described in an earlier report was used to monitor outbreaks of influenza in three successive winters. Influenza virus A was active in all of them, but the only major outbreak of influenza B was in 1973--4. The highest incidence of influenza A was in the 0--4 age group in all three winters, but schoolchildren bore the brunt of infections by influenza virus B.
一份早期报告中描述的监测计划被用于连续三个冬季监测流感疫情。甲型流感病毒在所有三个冬季都很活跃,但乙型流感的唯一一次主要疫情发生在1973 - 1974年。在所有三个冬季,甲型流感的发病率最高的是0 - 4岁年龄组,但小学生是乙型流感病毒感染的主要受害者。