But the third challenge we have, and probably even bigger one, the biggest challenge, is that, in contrast to smallpox where you could always see your enemy, every single person almost who was infected with smallpox had this telltale rash.
El tercer reto que tenemos es que, a diferencia la viruela, con la que siempre se veía al enemigo, ya que casi todas las personas infectadas presentaban estas erupciones tan reveladoras.