This poster has Chinese text and two contrasting pictures, one showing a baby who has a few marks on it’s arm as a result of being vaccinated against smallpox, and the other showing a person infected with the disease, whose face is covered with pock marks.
English Translation
Small Pox Vaccination
Top picture: Get the vaccine and you will have a mark.
Bottom picture: If you do not get the vaccine, you will get pock marks on your face.
Simplified Transcription
速来种痘
上图：种痘者 有痘疤
下图：不种痘者有麻脸