Richmond recently returned to the Brentwood postal facility where he was infected.

CNN: An anthrax survivor looks back

Checks of the postal facility did not begin until Friday and checks of workers did not start until Sunday, according to Deborah Willhite, with the U.S. Postal Service.

CNN: Postal workers angry over response

Thayles Davis, another employee at the Brentwood facility, said postal workers have been supplied with masks and gloves.

CNN: Postal workers angry over response

Health officials Monday stepped up their advisories to postal workers, particularly those who worked in the backroom area of the Brentwood facility and another airmail site near Baltimore Washington International Airport.

CNN: Postal workers angry over response