I've just seen this report on the dissident website Hablemos Press: Aumentan los casos de cólera en la capital cubana. [Cholera cases increase in the Cuban capital] Here's my translation of the whole story, with a comment at the end:
Public Health Ministry officials have declared a state of alert for the People's Councils of Jesús María and Belén, in Old Havana, over the presence of cholera cases, according to doctors who had just completed a house-to-house inspection.
The authorities have activated emergency posts, with trained personnel, in polyclinics and hospitals to treat the cases that are appearing. Meanwhile, agents of the Anti-Vector Campaign are cleaning up streets and buildings in the two People's Councils and distributing medication to the public to prevent dehydration.
A vehicle with a loudspeaker is circulating all over Old Havana, alerting the public to the measures they should take against the symptoms (vomiting, fever, acute diarrhea).
A woman says over the loudspeaker: "The Ministry of Public Health informs the public that they should go to the doctor at once in they have vomiting, fever, and acute diarrhea, and they should never try to treat themselves. Citizens who have a relative visiting from the east of the country, and who has these symptoms, should take the person to the hospital at once."
The loudspeaker also said: "Beginning Monday, December 17, health personnel will take workshops to equip them treat the epidemic effectively."
A member of the Anti-Vector Campaign said in conversation: "There's been a great increase in cases of hemorrhagic dengue all over the capital, and they've detected dozens of cases of cholera. They're afraid of an increase in the cases. The government is taking serious steps against food sellers who aren't following hygiene."
A doctor who preferred to remain anonymous said: "Forty-seven cases have been detected in Old Havana; 17 are residents, and 33 come from the eastern provinces. The government isn't publicly admitting that cholera and dengue are in the capital, because it would hurt tourism."
I note that the report doesn't say whether the "47 cases" are dengue or cholera, but the reference to people from the east implies cholera.