why quarantine for 14 days after travel?

why quarantine for 14 days after travel?
You may have been exposed to COVID-19 on your travels. You may feel well and not have any symptoms, but you can be contagious without symptoms and spread the virus to others. You and your travel companions (including children) pose a risk to your family, friends, and community for 14 days after you travel.
Full answer in: www.cdc.gov
Are there any quarantine requirements after travelling to Mexico during the COVID-19 pandemic?
Get tested with a viral test 3–5 days after travel AND stay home to self-quarantine for a full 7 days after travel.
Full answer in: wwwnc.cdc.gov
Does the student need to go through 14 days of quarantine even if the test results for COVID-19 were negative?
To best protect the student and others, have the student stay home for the full 14 days. Check your local health department's website for information about options in your area to possibly shorten this quarantine period. (See When to Quarantine for more information.)
Full answer in: www.cdc.gov
How long do you need to quarantine after travelling during the COVID-19 pandemic?
Get tested with a viral test 3-5 days after travel AND stay home and self-quarantine for a full 7 days after travel. Even if you test negative, stay home and self-quarantine for the full 7 days. If your test is positive, isolate yourself to protect others from getting infected. If you don't get tested, stay home and self-quarantine for 10 days after travel. Feb 19, 2021
Full answer in: www.cdc.gov
Should I get tested for COVID-19 after traveling to Antigua and Barbuda
After you travel, get tested 3–5 days after travel AND stay home to self-quarantine for 7 days after travel. If you don't get tested, it's safest to stay home to self-quarantine for 10 days.
Full answer in: wwwnc.cdc.gov