One-fifth of yellow fever vaccine very effective


The administering of a fraction of the standard yellow fever vaccine is effective and could help vaccinate millions of people during emergencies, a new study has shown.

The study led by the research arm of Doctors Without Borders/Médecins Sans Frontiéres’ (MSF), Epicentre, and published in The Lancet shows that fractioning doses of the yellow fever vaccine is effective and safe.

According to the study, giving a person one-fifth of the vaccine dose is safe and could prevent people from getting sick from the disease.

“These clinical trial results found that giving a person one-fifth of the standard yellow fever vaccine dose is effective and safe,” MSF said in a statement published on its website.

It said this will make it easier for governments and international organizations to prevent people from getting sick from yellow fever during outbreaks in times of vaccine shortage.

“When big yellow fever epidemics hit, countries and MSF need to access vaccines urgently.”

“This study means that treatment providers can now rest assured that giving people smaller doses of any of the World Health Organization (WHO) prequalified yellow fever vaccines will…



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