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Health

WHO says that just one dose yellow fever

22/05/2013

This article was translated by an automatic translation system, and was therefore not reviewed by people.

 


 




Ministry of Health has recommended applying boosters every ten years. The current vaccine is one of the requirements for tourists entering the country
Pressed by the lack of vaccines against yellow fever in the world and with recent results of scientific studies in hand, the World Health Organization (WHO) announced on Friday a new recommendation to governments: the suspension of the second dose of vaccine, currently being used ten years after the first. According to WHO, research indicates that only one dose of vaccine is enough to immunize against yellow fever throughout life. The proposal will be presented next week to governments and WHO hopes its approval.

Since the beginning of vaccination campaigns in 1930, 600 million doses have been applied around the world. According to WHO data, since only 12 cases have been recorded of people who really need to take a second dose of the vaccine.

WHO stresses that vaccines have not become more effective in recent years and, therefore, persons receiving the vaccine for a decade, for example, would be protected so as someone who has just been vaccinated. "" The vaccines have not changed. Was the accumulation of information that made us reach new scientific conclusion "," said Philippe Douclos, scientific secretary of the WHO.

In much of Africa, governments already apply just one dose per person. In Latin America, the practice still points to a booster every ten years. Douclos recognizes that each country will have freedom to adopt the suggestion or not. But no secret that he hopes the Brazilian government to do a review of its practices and accepted the proposal.

Sought, the Ministry of Health reported that to date remains the recommendation to apply the vaccine boosters every ten years. He also stressed that the risk of adverse events is lower in doses of reinforcements.

Brazil is one of 44 countries where yellow fever is still endemic, according to WHO data, only 64% of the population in the affected areas are immunized. The information should also affect tourists because the current vaccine is one of the requirements to enter Brazil.

Production - If the decision is part medical, part is economic. Today, only four companies in the world produce the vaccine in scale and quality. One is the Bio-Manguinhos, located in Rio

Faced with low prices and a market focused only on the poorest countries, pharmaceutical companies do not invest in the production of these vaccines. Today, the annual capacity reaches only 100 million doses - enough if countries like Nigeria embark in coming years in a mass immunization of the population.

Douclos indicates that reducing the need for two doses in one country can free up resources and space for the vaccine to reach other regions. He insists, however, that this is not the reason for the decision. Officially, 200,000 cases of yellow fever are reported annually in the world with 30,000 dead.
But WHO suspect the number is much higher.

(With Estadão Content)



Source: See Online

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