This guidance is based on what is currently known about the transmission of SARS-CoV-2, the virus that causes coronavirus disease 2019 (COVID-19). COVID-19 is a respiratory illness that can spread from person to person, especially between people who are physically near each other (within about 6 feet). People who are infected but do not show symptoms can also spread the virus to others.
COVID-19 spreads when an infected person breathes out droplets and very small particles that contain the virus. These droplets and particles can be breathed in by other people or land on their eyes, noses, or mouth. In some circumstances, they may contaminate surfaces they touch. People who are closer than 6 feet from the infected person are most likely to get infected.
Implementing this guidance may help prevent workplace exposures to SARS-CoV-2 in non-healthcare settings; separate guidance is available for healthcare settings. CDC also has guidance for critical infrastructure work settings. Unless otherwise specified, this interim guidance for businesses and employers applies to critical infrastructure workplaces as well.
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.
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