A large study has linked Covid-19 vaccination to only a modest reduction in the risk of Long Covid symptoms following a breakthrough infection, including the risk of death in the months after recovering from the initial infection.

Researchers involved in the study warned that this meant relying on vaccination alone to defend against Covid-19 will not be enough to mitigate the disease’s long-term consequences.

Additional measures will be needed, such as preventing such infections from occurring in the first place.

“These results show that...