Modern-to-ancient Transmigration: Little Doctor.

Summary

Wen Jing Hui concocts pills for the Yong Le Emperor's health while worrying about the return of Wu Da. When Wu Da arrives, he reveals a smallpox outbreak threatening the capital. Wen Jing Hui vaccinates his family and servants with cowpox to prevent the disease. As the city seals off, Wen Jing Hui and Wu Da report to the Yong Le Emperor, who is initially skeptical but intrigued by their method. The inoculation is enforced, leading to a rush for vaccinations. Meanwhile, the Yong Le Emperor's grandson, the crown prince, contracts smallpox, prompting urgent action from Wen Jing Hui to protect the royal family.

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