Dr. Brenda Fitzgerald has resigned as director of the Centers for Disease Control and Prevention following a report by Politico that she bought shares in a tobacco company just months into the job. The report also noted that she invested in drug, health insurance, and food companies.

Secretary of Health and Human Services Alex Azar accepted her resignation this morning, according to a statement by a spokesperson for the department.

“Dr. Fitzgerald owns certain complex financial interests that have imposed a broad recusal limiting her ability to complete all of her duties as the CDC Director,” the statement read. “Due to the nature of these financial interests, Dr. Fitzgerald could not divest from them in a definitive time period. After advising Secretary Azar of both the status of the financial interests and the scope of her recusal, Dr. Fitzgerald tendered, and the Secretary accepted, her resignation.”

According to Politico, Fitzgerald bought tens of thousands of dollars in stock shortly after taking the CDC position in July. The purchases included one in August of between $1,001 and $15,000 in Japan Tobacco, which sells four tobacco brands in the US under a subsidiary. She also purchased stock in drug companies Merck & Co. and Bayer, the health insurance company Humana, and US Food Holding Co., according to financial documents.

A day after buying the tobacco stock, Fitzgerald toured the CDC’s Tobacco Laboratory, which researches the health effects of tobacco. She has made anti-smoking and tobacco cessation efforts a primary focus of her career as a public health official.

Fitzgerald, a medical doctor, was commissioner of the Georgia Department of Public Health prior to taking her role at the CDC. During her time as commissioner, she owned stock in five other tobacco companies, which was legal under Georgia’s ethics rules.

According to financial records, Fitzgerald sold her Japan Tobacco stock in October and completely divested from all stock holdings greater than $1,000 by the end of November.

Some lawmakers have criticized her for her complex financial ties and inability to offload two financial holdings. According to a Washington Post report in December, Fitzgerald and her husband are legally obligated to maintain investments in cancer detection and health information technology. In her HHS ethics agreement, Fitzgerald was required to avoid government business that might conflict with those interests.

Sen. Patty Murray (D-Wash.), the senior Democrat on the Senate committee that oversees the CDC, was critical of the limitations. “I am concerned that you cannot perform the role of CDC director while being largely recused from matters pertaining to cancer and opioids, two of the most pervasive and urgent health challenges we face as a country,” she wrote at the time.