Pupils who have not been vaccinated against measles may be sent home from school if there is a local outbreak.
Health leaders in London are meeting today to discuss whether to stop unvaccinated children from coming into school.
It follows a decision made in the London borough of Enfield after an outbreak of the disease.
This year, north London has seen 100 confirmed cases of measles, with the number across the capital thought to be even higher.
Some of the children have been hospitalised by the virus, which can cause serious and even fatal complications if it spreads to the brain.
In 2024, the UK saw its worst measles outbreak on record, with 3,681 confirmed cases. In July, a child died after contracting the virus.
As a result, the UK officially lost its measles elimination status in January, as announced by the World Health Organisation.
Emma Best, health committee lead at the London Assembly will chair an e