Update: The site came back up by early evening; the CDC has not announced what caused the outage.

July 28, 2022 (Washington D.C.) - The website for the U.S. Centers for Disease Control (https://www.cdc.gov) has been down for at least half an hour, as of 4:30 p.m. Eastern Standard Time.

ECM's editor found the site down while attempting to research travel vaccine requirements. She notified the CDC's media relations office, which was unaware of the outage.