宾夕法尼亚州学校的疫苗接种率下降,引发了公众健康问题. Pennsylvania school vaccination rates drop, raising public health concerns.

宾夕法尼亚州学校接种疫苗的比例急剧下降, 这引发了公众健康问题, 因为免疫水平低于麻疹等疾病的推值. Pennsylvania school vaccination rates have declined sharply, raising public health concerns as immunity levels fall below recommended thresholds for diseases like measles. 匹兹堡邮报的一项调查发现,数百所学校面临疫情爆发的风险,数千名学生因豁免和缺乏执法而没有必要接种免疫. A Pittsburgh Post-Gazette investigation found hundreds of schools at risk of outbreaks, with thousands of students attending without required immunizations due to exemptions and lack of enforcement.