49
有必要强制接种疫苗吗？听听专家怎么说
source link: https://tech.sina.com.cn/d/f/2019-08-14/doc-ihytcitm9041193.shtml
Go to the source link to view the article. You can view the picture content, updated content and better typesetting reading experience. If the link is broken, please click the button below to view the snapshot at that time.
来源：Nature自然科研今年1-4月，世界卫生组织（WHO）共报告了约22.6万例麻疹病例，几乎是去年同期记录的三倍（参见go.nature.com/2jkq8d3）。自2000年开始，美国境内的麻疹病毒不再持续传播，但是，今年美国报告的
Recommend
About Joyk
Aggregate valuable and interesting links.
Joyk means Joy of geeK