Chickenpox
Although chickenpox was confused with smallpox until very recent times, the history of the reign of King Myongjong (1545—67) refers to “big” and “small” eruptive diseases. The big eruptive disease probably corresponds to smallpox; however, whether the small eruptive disease corresponds to chickenpox or measles is uncertain.
In the Sukchong Sillok (Sukchong reigned from 1674 to 1720), a description of eruptive diseases with big and small efflorescences survives that suggests a slightly different meaning from previous records of these eruptive diseases. At this time, measles was generally distinguished from smallpox, so the small eruptive disease could have been chickenpox. In the records of the period 172476, references to episodes of illness and recovery of the Queen and the Prince included all the symptoms of chickenpox. Similar examples can be found following the middle period of the Yi Dynasty.
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