Claims are spreading online about what the detection of the polio virus in London sewage means.
UK health officials believe the polio they found in sewage samples may have been brought to the UK by someone who was vaccinated abroad with a live form of the virus.
But misleading posts, shared on Twitter and on the encrypted messaging app Telegram, are suggesting that vaccines in general can cause disease outbreaks.
Many of these come from people who have been campaigning against Covid vaccines.
Here’s what we do know.- click the link to BBC News article