Important update: Healthcare facilities
CDC has updated select ways to operate healthcare systems effectively in response to COVID-19 vaccination. Learn more
UPDATE
Given new evidence on the B.1.617.2 (Delta) variant, CDC has updated the guidance for fully vaccinated people. CDC recommends universal indoor masking for all teachers, staff, students, and visitors to K-12 schools, regardless of vaccination status. Children should return to full-time in-person learning in the fall with layered prevention strategies in place.
UPDATE
The White House announced that vaccines will be required for international travelers coming into the United States, with an effective date of November 8, 2021. For purposes of entry into the United States, vaccines accepted will include FDA approved or authorized and WHO Emergency Use Listing vaccines. More information is available here.
UPDATE
Travel requirements to enter the United States are changing, starting November 8, 2021. More information is available here.

Steps for Determining Close Contact and Quarantine in K–12 Schools

Steps for Determining Close Contact and Quarantine in K–12 Schools
Steps for Determining Close Contact and Quarantine in K–12 Schools
Students in INDOOR CLASSROOMS and STRUCTURED OUTDOOR SETTINGS Students in NON-CLASSROOM SETTINGS and adults in ALL SCHOOL SETTINGS
If yes to all of the below, the student is a close contact, regardless of proper mask use.

If no to any, move to the next column.

If yes to all of the below, the student is a close contact.

If no to any, then the student is not a close contact.

If yes to all of the below, the person is a close contact, regardless of proper mask use.

If no to any, the person is not a close contact.

LESS THAN 3 FEET WITHIN 3–6 FEET LESS THAN 6 FEET
Was the student within 3 feet of another student diagnosed with COVID-19? Was the student within 3 to 6 feet of another student diagnosed with COVID-19? Was the student or adult within 6 feet of someone diagnosed with COVID-19?
Has the student been in the presence of a student with confirmed or suspected COVID-19 for a cumulative total of 15 minutes or more over a 24-hour period? Has the student been in the presence of a student with confirmed or suspected COVID-19 for a cumulative total of 15 minutes or more over a 24-hour period? Has the person been in the presence of a person with confirmed or suspected COVID-19 for a cumulative total of 15 minutes or more over a 24-hour period?
If the answers to the questions above are both yes, the student is a close contact, regardless of proper mask use. Were either of the two students wearing masks inconsistently, incorrectly, or not at all?

Use masks to slow the spread of COVID-19.

If the answers to the questions above are both yes, the person is a close contact, regardless of proper mask use.

Does the close contact need to quarantine?

If they are NOT FULLY VACCINATED

The close contact needs to quarantine.

The close contact should monitor for symptoms and get tested immediately and again 5–7 days after the exposure. The close contact should wear a mask if they must be around others.

A school or public health official will determine the length of the quarantine. CDC recommends a total of 14 days from the date of the exposure.

Regardless of vaccination status, if a close contact develops symptoms, they should isolate and get tested immediately.

If they are FULLY VACCINATED

The close contact does not need to quarantine.

The close contact should monitor for symptoms, get tested 5–7 days after the exposure, and wear a mask indoors in public for 14 days or until they receive a negative test result.

Regardless of vaccination status, if a close contact develops symptoms, they should isolate and get tested immediately.

If they have had COVID-19 WITHIN THE PAST 90 DAYS, COMPLETED ISOLATION, and RECOVERED

The close contact does not need to quarantine.

The close contact should monitor for symptoms, wear a mask indoors in public for 14 days, and speak with a healthcare professional about testing recommendations.

Close contacts who had a prior infection in the past 90 days and who develop new symptoms should isolate immediately and consult a healthcare professional for testing recommendations.