目的：配对调查母婴血细胞B19病毒感染情况。
Objective: To investigate the infection of Human Parvovirus B19 in blood cells in pregnant women and newborns.
方法选取某焦化厂炼焦操作工65人和对照组65人进行呼吸系统疾患及肺功能配对调查。
Method According to matching rules, a matching study of pulmonary function tests was performed in 65 coking workers and 65 mechanical workers.
方法选取某焦化厂炼焦操作工65人和对照组65人进行呼吸系统疾患及肺功能配对调查。
Method According to matching rules, a matching study of pulmonary function tests was performed in 65 coking workers and 65 mechanical workers.
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