Enact a subrule to “Diseases” called “Symptoms”:-

Each Villager may exhibit one or more Symptoms, and some of those Symptoms may be Visible. A Villager’s Visible Symptoms are tracked in the GNDT, and their non-Visible Symptoms are tracked privately by the Doctor. Symptoms and their effects are:-

• Cough. Visible. A Villager exhibiting a Cough should include the string “*cough*” in every blog comment they make.
• Headache.
• Mouth Pain.
• Sore Throat.

When a Villager starts to exhibit a non-Visible Symptom, the Doctor must privately inform them of this fact.

As a daily action which may only be taken on Mondays and Thursdays, the Doctor may Examine the Villagers. Upon doing so, for each Disease a Villager has which they do not already exhibit all the Symptoms of, that Villager has a 50% chance of exhibiting the earliest Symptom of that Disease which they do not already exhibit. (The Doctor may resolve this using a random method of his choice.)

In “Diseases”, replace “When a Villager catches a Disease, the Doctor must privately inform them of this fact.” with:-

Each Disease has a number of Symptoms, listed in order from earliest to latest.

List the symptoms of Ague as “Headache”, the symptoms of The Black Death as “Headache, Sore Throat, Cough”, the symptoms of the Pox as “Mouth Pain, Sore Throat, Cough” and the symptoms of Toothache as “Mouth Pain”.