日趋激烈的竞争和这些公司所创造的新型制造工艺已让儿童可以免受八种主要疾病的伤害，包括破伤风、百日咳、脊髓灰质炎和结核病等，成本只需要不到30美元。
The increased competition and new manufacturing approaches created by these companies have made it possible to protect a child against eight major diseases – including tetanus, whooping cough, polio, and tuberculosis – for less than $30.