Via UK in Cuba, the website of the British embassy: Cuba travel advice. Excerpt:
On 15 January 2013, the Cuban authorities reported 51 confirmed cases of cholera in Havana. This follows their report of an earlier outbreak which started in the east of Cuba from June to August 2012. You are strongly advised to monitor local reporting, take sensible precautions regarding water, food and personal hygiene and seek immediate medical attention if you suffer from diarrhoea. For further information visit the National Travel Health Network and Centre website. See Health.The site also emphasizes that "there are no travel restrictions in place in this travel advice for in Cuba[sic]."
The Canadian embassy, meanwhile, links to this Public Health Agency of Canada travel notice on cholera in Cuba, the Dominican Republic, and Haiti.
