Anthrax Case Timeline

First anthrax letter received and opened by an intern at Sen. Tom Daschle's office.

Navy infectious disease specialist Greg Martin arrives at the senator's office to investigate

Contents of letter confirmed to be deadly dose of anthrax; emergency personnel quarantine the office, begin staffers on Cipro antibiotic

Robert Stevens, 62 year-old man in Boca Raton, hospitalized with inhalation anthrax

Robert Stevens dies, prompting Secy of Health and and Human Services to issue briefing that the event was isolated

Ernesto Blanco, Stevens' coworker, diagnosed with inhalation anthrax as CDC and FBI actively investigated Stevens' case

Robert Stevens initially handled letter laced with "fine white talc"

Ernesto Blanco fell ill and sought treatment

Blanco's treatment for inhalation anthrax was successful and he is discharged from the hospital

FBI began criminal investigation into Florida anthrax cases

Another anthrax case surfaces in news reports

NBC assistant to Tom Brokaw, Erin O'Connor, handled threatening letter postmarked Sep. 18 in Trenton, NJ

Erin O'Connor seeks medical attention for cutaneous anthrax

Casey Chamberlain, another assistant to Tom Brakow, developed cutaneous anthrax

Reports surface on "New York Post" employee, Johanna Huden, who also had cutaneous anthrax

Johanna Huden first noticed a bump on her finger, and visited multiple doctors before self-diagnosing anthrax

An unnamed employee of "New York Post" developed cutaneous anthrax

Mark Cunningham, editor for "New York Post," developed cutaneous anthrax

7 month-old child of ABC employee developed cutaneous anthrax after visiting mother's office

7 month-old with anthrax admitted to hospital

Claire Fletcher, assistant to CBS News anchors Dan Rather, developed cutaneous anthrax

Richard Morgano, postal worker, presented with cutaneous anthrax

Richard Morgano is exposed and becomes infected with anthrax after scratching arm fixing a jammed machine

Teresa Heller, mail carrier, falls ill with cutaneous anthrax

Norma Wallace, postal worker, diagnosed with inhalation anthrax

Norma Walace exposed to and become infected with anthrax after colleague shoots compressed air into jammed machine, releasing dust particles

Linda Burch, accountant, develops lesion on forehead

4 Capitol Hill postal workers develop inhalation anthrax

Thomas Morris, Capitol Hill postal worker, dies

Joseph Curseen Jr., Capitol Hill postal worker, dies

David Hose, postal worker in Streling, Virginia, develops inhalation anthrax (but survives)

Kathy Nguyen, Manhattan Eye stockroom attendant, falls ill

Kathy Nguyen dies

94 year-old Ottilie Lundgren becomes ill

Ottilie Lundgren dies

FBI and EPA receive a 4th anthrax letter (key evidence)

CDC confirms strains of anthrax in Daschle and Brokaw letters match

Investigators find mailbox in Princeton, NJ, heavily contaminated with anthrax

Media features rough profile of suspect

Investigators narrowed search to 30 people at USAMRIID and Dugway Proving Ground

Atty General John Ashcroft announces Steven J Hatfill as a POI

Patrick O'Donnell, Hamilton postal worker, develops symptoms of acute cutaneous anthrax and is hospitalized

Jyotsna Patel, postal worker, develops inhalation anthrax and is hospitalized