International – Genetically altered vaccines developed to help eradicate polio

Researchers have genetically altered oral polio vaccines to significantly reduce the likelihood of the weakened virus mutating into a dangerous form that can cause outbreaks and paralysis.

Polio is a highly infectious viral disease that largely affects children aged under five years. The virus is transmitted by person-to-person and multiplies in the intestine, from where it can invade the nervous system and cause paralysis.

Cases have decreased by over 99% since 1988, from an estimated 350,000 cases in more than 125 endemic countries to six reported cases in 2021, and more than 20 million people who would otherwise have been paralysed are able to walk today thanks to vaccines…