@tiggerbluedevil @mskathleenquinn @andyaschmidt Because covid vaccines are very ineffective against transmission, measles vaccines are very effective against transmission. Measles is very contained apart from episodic localized outbreaks. Different pathogen, different response.
@tiggerbluedevil@mskathleenquinn@andyaschmidt因为新冠病毒疫苗对传播非常无效，麻疹疫苗对传播非常有效。除了偶发的局部暴发外，麻疹得到了很好的控制。不同的病原体，不同的反应。