ATLANTA — A Dallas nurse whose Ebola diagnosis and airline trips elevated public concerns that the virus could spread in the United States was discharged from a hospital here on Tuesday.

The nurse, Amber Joy Vinson, spent less than two weeks in a specialized ward at Emory University Hospital before doctors said she was free of the virus, which has infected more than 10,000 people, mostly in West Africa, in an outbreak this year. Ms. Vinson is one of four people to test positive for Ebola in the United States, although hospitals have treated others who got the virus while abroad.

“I am so grateful to be well, and first and foremost, I want to thank God,” Ms. Vinson said at a news conference on Tuesday at Emory, which since August has successfully treated three other patients with Ebola.

She did not discuss the circumstances of her infection, nor her activities in the days before her diagnosis.

Ms. Vinson was among the employees of Texas Health Presbyterian Hospital who were involved in the care of Thomas Eric Duncan, a Liberian man diagnosed with Ebola in late September. He died on Oct. 8. In addition to Ms. Vinson, another nurse at Presbyterian, Nina Pham, was infected; she was released last week from the National Institutes of Health Clinical Center in Bethesda, Md.