Monday, December 6, 2021

Omicron Variant

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CDC Centers for Disease Control and Prevention CDC 24/7: Saving Lives, Protecting People
Coronavirus Disease 2019 (COVID-19)
December 6, 2021
This message includes updates on the COVID-19 response from CDC. The COVID-19 Outbreak is a rapidly evolving situation and information will be updated as it becomes available.
Illustration of Omicron variant

Omicron Variant

On November 26, 2021, the World Health Organization classified a new COVID-19 variant as a variant of concern and named it Omicron. As of December 4, 2021, Omicron has been identified in the United States and is reported now in more than 20 countries.


CDC has been actively monitoring and preparing for this variant and continues to work diligently with other U.S. and global public health and industry partners to learn more.


The virus that causes COVID-19 is constantly changing, and new variants of the virus are expected to occur. Sometimes new variants emerge and disappear. Other times, new variants persist.


The recent emergence of the Omicron variant further emphasizes the importance of vaccination, boosters, and general prevention strategies needed to protect against COVID-19. Everyone 5 and older should get vaccinated and boosters are recommended for everyone 18 years and older.


International Travelers U.S. travel requirements have changed learn more

International Travel

If you plan to travel internationally, you will need to get a COVID-19 viral test (regardless of vaccination status or citizenship) no more than 1 day before you travel by air into the United States. You must show your negative result to the airline before you board your flight.


As we learn more about the Omicron variant, this new one-day testing policy will help to protect travelers and the health and safety of American communities from COVID-19.


CDC continues to recommend that all travelers get a COVID-19 viral test 3-5 days after arrival, and that unvaccinated travelers should quarantine for 7 days after travel.


Do NOT travel if:

  • You have been exposed to COVID-19, unless you are fully vaccinated or recovered from COVID-19 in the past 90 days.
  • You are sick.
  • You tested positive for COVID-19 and haven’t ended isolation (even if you are fully vaccinated).
  • You are waiting for results of a COVID-19 test.


Keep your family and community safer this holiday season by getting fully vaccinated against COVID-19 vaccines.gov

Key Things to Know About COVID-19 Vaccines

Everyone 5 years and older is eligible to get a free COVID-19 vaccination.


Everyone ages 18 years and older who is fully vaccinated should get a booster shot.


COVID-19 vaccines are effective at helping protect against severe disease and death from the virus that causes COVID-19.


The benefits of COVID-19 vaccination outweigh the known and potential risks, which are rare.


People who are fully vaccinated can resume many activities they did before the pandemic. However, people should wear a mask indoors in public if they are in an area of substantial or high transmission.



New Edition Out Now COVID Data Tracker Weekly Review Friday, December 3, 2021 In this week's edition: Vaccination among pregnant people Find the latest data in CDC's COVID Data Tracker Weekly Review Subscribe: bit.ly/CDTsubscribe

COVID Data Tracker Weekly Review

People who are pregnant or were recently pregnant are at increased risk for severe outcomes from COVID-19, including ICU admission, being on a ventilator, death, and stillbirth. However, COVID-19 vaccination among pregnant people in the United States remains low. CDC recommends people who are pregnant, breastfeeding, trying to get pregnant now, or who might become pregnant in the future get vaccinated against COVID-19. 



Coronavirus Disease 2019 (COVID-19) in the U.S.

December 6, 2021

US states, territories, and District of Columbia have reported 49,002,475 cases of COVID-19 in the United States.


CDC provides updated U.S. case information online daily.


In addition to cases, deaths, and laboratory testing, CDC's COVID Data Tracker now has a Vaccinations tab to track distribution of COVID-19 vaccines in your state.

This map shows COVID-19 cases reported by U.S. states, the District of Columbia, New York City, and other U.S.-affiliated jurisdictions

Centers for Disease Control and Prevention

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