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MELBOURNE, Australia (February 25, 2002 – Radio Australia)---An Australian researcher has concluded that a small but relatively successful trial of a malaria vaccine needs to be repeated on a much larger scale.

The head of the Queensland Institute of Medical Research Michael Good, said the study was conducted in conjunction with health authorities in Papua New Guinea.

Professor Good said the study showed that if children received the three-component vaccine they had significantly fewer parasites in their blood.

"The malaria parasite is noted for its ability to change its coat, and the children were vaccinated with one type of malaria parasite. And that particular type was found less in the vaccinated children," Professor Good said, "but the other type wasn't affected as much.

"So this really underlines one of the problems that we have in developing vaccines for malaria. There are a number of multiple strains out there and we have to be able to devise strategies which will protect against all the strains."

For additional reports from Radio Australia, go to PACIFIC ISLANDS REPORT News/Information Links: Radio/TV News/Radio Australia.

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