The UN health agency says there are around 30 countries around the world that have reported cholera outbreaks this year which is about a third higher than a typical year.

“We have no more vaccines. More countries are continuing to request (them) and it’s extremely challenging,” said Dr Philippe Barboza, team lead for cholera and epidemic diarrhoeal diseases, at WHO.

“All the vaccines that have been produced are already allocated,” he added.

He was referring to an emergency stockpile held by the International Coordinating Group on vaccine provision that is managed by WHO and other partners.

Typically, it has about 36 million doses available a year.

The shortage of vaccines has already prompted the WHO to temporarily suspend the standard two-dose vaccination strategy in October.

Barboza said part of the crunch was due to the decision by an Indian manufacturer to halt production, without giving details.

Many of the countries with outbreaks are those affected by poverty and conflict such as Haiti and Yemen but the disease has also been reported in countries like Lebanon which until recently was a middle-income country.