The World Health Organization and its partners are recommending that countries temporarily switch to using a single dose of the cholera vaccine instead of two due to a supply shortage as outbreaks of the water-borne disease surge globally.
In a statement on Wednesday, the U.N. agency and partners that include UNICEF and the International Federation of Red Cross and Red Crescent Societies said one dose of vaccine has proven effective in stopping outbreaks "even though evidence on the exact duration of protection is limited" and appears to be lower in children.
WHO Director-General Tedros Adhanom Ghebreyesus said cholera can sometimes kill within a day and warned that outbreaks in 29 countries this year were putting "unprecedented pressure" on the world's limited vaccine supply. He said authorities should aim to scale up vaccine production and that "rationing must only be a temporary solution."
WHO said that of the 36 million vaccine doses expected for 2022, 24 million were already been shipped for immunization campaigns. It said there was no short-term solution to increase production. A global task force on cholera has estimated that the world needs about 250 million cholera vaccines until 2025, both to stop outbreaks and for preventive immunization campaigns.
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