The Delta variant causes more infections and spreads faster than earlier forms of the virus that causes COVID-19. It might cause more severe illness than previous strains in unvaccinated people.

• Vaccines continue to reduce a person’s risk of contracting the virus that cause COVID-19, including this variant.
• Vaccines continue to be highly effective at preventing hospitalization and death, including against this variant.
• Fully vaccinated people with breakthrough infections from this variant appear to be infectious for a shorter period.
• Get vaccinated and wear masks indoors in public spaces to reduce the spread of this variant.