对于严重的不良反应事件及逐渐增多的相关问题，应该上报该国卫生部门。
Reports of serious adverse events, and those raising concerns, should always be submitted to national authorities.
他们还提到，由于担心以前的全细胞百日咳疫苗日渐增强的致反应力，因此不推荐对6岁以上年龄的青少年使用。
Previously vaccination against pertussis was not recommended for those over 6 years of age, they add, because of concerns of increased reactogenicity of the whole-cell vaccines.
反应器底部的污泥床层是VFA生成的主要反应区，随着olr的升高，达到稳定VFA浓度的反应器高度逐渐增加。
The sludge bed in the bottom of the reactor was the main reaction field for VFA production, and the height of the reactor for stable VFA production increased with the increase of OLR.
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