Transmission & Isolation

Updated patient-facing CDC explainer describes who should isolate, when, and for how long.

Interim CDC guidance for health care professionals on how and when to end isolation for patients with COVID-19.

Interim guidance from the CDC on return-to-work decisions. 

Perceived high local COVID-19 transmission was associated with more use of preventive behaviors, according to this CDC MMWR.

Omicron infection resulted in high transmission in households, particularly when index patients were not vaccinated or did not take measures to mitigate transmission, according to this CDC MMWR.

In a study of 173 vaccinated adults with COVID-19 during Omicron, 46% received a negative or high cycle threshold RT-PCR test result on or before day six after diagnosis, according to this CDC MMWR.

A study of COVID-19 patients in Alaska this year found that between five and nine days after symptom onset or after initial diagnosis, 54% of persons had positive SARS-CoV-2 antigen test results, according to this CDC MMWR.

Attack rates among a cohort attending a convention were high, but lower among infected attendees’ household members and those who had received a COVID-19 vaccine booster dose, according to this CDC MMWR.

Recording of COCA Call on CDC’s updated quarantine and isolation guidelines in which presenters discussed the science supporting these changes, populations and settings to which the changes apply, and additional precautions at the end of quarantine or isolation.