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For Healthcare Providers: COVID-19 Hub Vaccine Hub
For Everyone: VaccinateLACounty.com
Protecting Yourself and Others Ver página en español

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.

Breakthrough infection
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:

  • Wear a well-fitting mask when required- including in all indoor public places, worksites, K-12 schools, and at outdoor Mega Events in Los Angeles County (see below).
  • Wash (or sanitize) your hands often.
  • Stay home when you are sick. If you have symptoms of COVID-19, you should isolate, talk with a doctor, and get tested.

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.

When Am I Fully Vaccinated?

WHO has listed the following COVID-19 vaccines for emergency use:

  • Pfizer-BioNTech (e.g., COMIRNATY, Tozinameran)
  • Moderna
  • Johnson & Johnson (Janssen)
  • AstraZeneca-Oxford (e.g., Covishield, Vaxzevria)
  • Sinopharm
  • Sinovac

You are considered fully vaccinated against COVID-19 2 weeks after:

  • You got a Johnson & Johnson (J&J)/Janssen COVID-19 vaccine, or
  • You got a second dose of a Pfizer or Moderna COVID-19 vaccine, or
  • You finished the series of a COVID-19 vaccine that has been listed for emergency use by the World Health Organization [WHO]

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.

  • Talk with your doctor to discuss your activities. You may need to continue taking all precautions after vaccination to prevent COVID-19.
  • If you received 2 doses of Pfizer or Moderna vaccine, CDC recommends that you receive an additional dose of vaccine. Talk to your doctor about the need to get an additional dose of COVID-19 vaccine. If you need a 3rd dose, ask about the best timing based on your current treatment plan. This is especially important if you are about to start or restart immunosuppressive treatment. For more information, see ‘Additional doses for people with weakened immune systems (immunocompromised)’.
  • You always need to wear a mask:
    • On planes, buses, trains, and other forms of public transportation or ride share when traveling into, within, or out of the US.
    • In U.S. transportation hubs such as airports, train, and bus stations.
  • You can travel domestically and internationally. Be sure to follow the requirements of the area(s) that you are visiting. Some places may require you to show a negative test result before traveling. Be prepared and plan ahead.
  • Upon return to Los Angeles County from outside of California:
    • You should monitor your health for 14 days. As long as you have no symptoms, quarantine and testing are not needed after domestic travel.
  • Everyone 2 years of age and older must wear a mask in all indoor public settings, venues, gatherings, public and private businesses, and at outdoor Mega Events in Los Angeles County, whether they have been vaccinated or not.
  • Everyone*, regardless of vaccination status, must also wear a mask:
    • On all forms of public transportation and transportation hubs
    • In healthcare settings (including long-term care facilities)
    • In shelters and cooling centers
    • Indoors at any youth-serving facility (such as K-12 schools, childcare, day camps, etc.)
    • At outdoor Mega Events (events with over 10,000 attendees like concerts, sports games and parades)
    • In any other outdoor location where it is the policy of the business or venue

Note: You are allowed to take off your mask while you are:

  • Actively eating or drinking as long as you are sitting or standing in a specific place such as a table, counter, or ticketed seat. This means that you can briefly remove your mask when you are actually eating or drinking but you must put it back on immediately afterwards. You must also wear a mask when you are waiting to be served, between courses or drinks, and while seated after finishing your food or drink.
  • Alone in a separate room or space.
  • Showering or swimming.
  • Receiving personal hygiene or personal care services (like a facial or shave) that cannot be done without removing your mask.

*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,

  • If you have close contact to someone with COVID-19, it is recommended that you get tested for COVID-19.
  • If you are part of an outbreak investigation, you may be required to be tested.
  • In some high-risk settings when community transmission levels are high, you may be required to participate in routine surveillance testing.

See COVID-19 Tests for more information.

  • As long as you do not have symptoms, you do not have to quarantine if you are a close contact to someone with COVID-19 or after you have returned from out of state or international travel.
  • You still should get tested and monitor your health for symptoms of COVID-19 for 14 days after your last contact with the infected person or upon return to LA County. If you live with someone who is immunosuppressed, at increased risk of severe disease, or unvaccinated (including children <12 years of age) consider wearing a mask at home for 14 days or until you receive a negative test result

Visit the quarantine webpage for more information.

  • If you are diagnosed with COVID-19, you need to follow all isolation instructions.
  • If you live with or are caring for someone who has COVID-19, you should continue to take precautions including masking and physically distancing where possible.

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Public Health has made reasonable efforts to provide accurate translation. However, no computerized translation is perfect and is not intended to replace traditional translation methods. If questions arise concerning the accuracy of the information, please refer to the English edition of the website, which is the official version.

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