Man found to have been shedding virulent strain of polio for 30 years
Weakened form of polio from childhood immunisations lived on in subject’s gut, mutating into a strain which could cause paralysis in the unvaccinated
The polio virus. The British man was found to be carrying a form of the virus which had mutated from the weakened form used in vaccines.
The polio virus. The British man was found to be carrying a form of the virus which had mutated from the weakened form used in vaccines. Photograph: Dennis Kunkel/Microscopy, Inc.
Emily Mobley