We encourage you to republish this article online and in print, it’s free under our creative commons attribution license, but please follow some simple guidelines:
  1. You have to credit our authors.
  2. You have to credit SciDev.Net — where possible include our logo with a link back to the original article.
  3. You can simply run the first few lines of the article and then add: “Read the full article on SciDev.Net” containing a link back to the original article.
  4. If you want to also take images published in this story you will need to confirm with the original source if you're licensed to use them.
  5. The easiest way to get the article on your site is to embed the code below.
For more information view our media page and republishing guidelines.

The full article is available here as HTML.

Press Ctrl-C to copy

Scientists in the United States have developed a potential vaccine against hepatitis B by genetically modifying potato plants.

The modified plants produce one of the hepatitis virus's proteins, which might be enough to boost the immune systems of people eating the potatoes and protect them from infection.

The researchers at the Roswell Park Cancer Institute in Buffalo, New York, found signs of immunity in 60 per cent of the 42 people they tested it on.

Hepatitis B severely affects the liver and kills one million people each year. Many of these are in developing countries, where buying and storing the existing vaccine can be prohibitively expensive. The simplicity and low cost of an edible vaccine would make it ideal for global immunisation programmes.

The prototype needs more testing, and there are questions over whether the recently tested vaccine boosted people's immune system strongly enough. But Yasmin Thanavala and colleagues, whose results are published this week in Proceedings of the National Academy of Sciences of the United States of America, are confident it will lead to an oral hepatitis B vaccine that could be given as a capsule or powder.

Link to full BBC Online news story

Link to full text of paper in Proceedings of the National Academy of Sciences of the United States of America

Related topics