An '''Asympotomatic carrier''' is a [[carrier]] which shows no [[symptom]]s of carrying an infectious agent. In the California highlands, squirrels are asymptomatic carriers of the bubonic plague.
+
An '''Asympotomatic carrier''' is a [[carrier]] which shows no [[symptom]]s of carrying an infectious agent. In the California highlands, squirrels are asymptomatic carriers of the bubonic plague. Asymptomatic carriers were a significant problem for public health in earlier centuries; [[Typhoid Mary]] infected nearly fifty people, though she never manifested symptoms herself.