The COVID-19 vaccines that are currently available in the US protect vaccinated people from getting infected with the virus that causes COVID-19, including the Delta variant. People who are fully vaccinated can do more activities with fewer restrictions than people who are not fully vaccinated.
A small percent of people who are fully vaccinated are getting infected with the Delta variant of the COVID-19 virus. These “breakthrough infections” are expected even with highly effective vaccines. Importantly, breakthrough infections usually cause mild disease. If you get vaccinated, your risk of getting infected, having symptomatic disease, and especially of being hospitalized or dying is far lower than if you are not vaccinated. New data suggest that some vaccinated people who are infected with the Delta variant can spread the virus to others; this appears to only be a small part of the spread of the virus.
Even after you are fully vaccinated against COVID-19, continue to take precautions to protect yourself and others including:
For information on what to expect after you get a vaccine, including vaccine side effects and how to report them, see After you get a vaccine.
WHO has listed the following COVID-19 vaccines for emergency use:
You are considered fully vaccinated against COVID-19 2 weeks after:
Important information for people with weak immune systems
If you have a health condition or are taking medications that moderately or severely weaken your immune system (such as treatment for cancer, organ transplants or rheumatological conditions), vaccination may not be as effective.
Note: You are allowed to take off your mask while you are:
*There are some people who should not wear a mask, such as children younger than 2, people with certain medical conditions or disabilities, and people instructed by their medical provider not to wear a mask. Children ages 2 to 8 should wear a mask only when under adult supervision. See Who should not wear a mask and Special considerations for persons with communication difficulties or certain disabilities for details and information on alternative types of face coverings.
*In the workplace, workers must follow the most protective mask requirements as stated by Cal/OSHA and the County Health Officer Order. Certain employees may be exempt from wearing a mask in specific situations provided alternative safety measures are in place. See the Health Officer Order and Best Practices for Businesses webpage for details of workplace requirements.
As long as you do not have symptoms, you usually do not need to get tested for COVID-19. However,
See COVID-19 Tests for more information.
Visit the quarantine webpage for more information.