A large new study provides some of the strongest evidence yet that vaccines reduce the risk of developing long Covid.

Scientists looked at people in the United States infected during the first two years of the pandemic and found that the percentage of vaccinated people who developed long Covid was much lower than the percentage of unvaccinated people who did.

Medical experts have previously said that vaccines can lower the risk of long Covid, largely because they help prevent severe illness during the infection period and people with severe infections are more likely to have long-term symptoms.