Collingham K E, Pollock T M, Roebuck M O
Lancet. 1978 May 6;1(8071):976-7. doi: 10.1016/s0140-6736(78)90260-x.
In 1976-7 26 cases of paralytic poliomyelitis were notified, of which 6 were vaccine-associated. 16 of the 20 non-vaccine-associated cases were due to type-u poliovirus, the type usually associated with outbreaks. The most important factor in the increase was the occurrence of poliomyelitis in unvaccinated persons.
1976年至1977年期间,共报告了26例麻痹性脊髓灰质炎病例,其中6例与疫苗有关。20例非疫苗相关病例中有16例由脊髓灰质炎Ⅱ型病毒引起,该型病毒通常与疫情爆发有关。病例增加的最重要因素是未接种疫苗人群中出现了脊髓灰质炎。