‘Not just measles’: Whooping cough cases are soari
标签： 疫苗接种率的下降
随着疫苗接种率的下降，麻疹和脊髓灰质炎等疾病的广泛爆发可能会再次出现
As vaccination rates decline, widespread outbreaks
‘Not just measles’: Whooping cough cases are soari
As vaccination rates decline, widespread outbreaks