A five-year-old boy who arrived from Guinea is being tested for Ebola in New York, while a nurse held in quarantine in New Jersey has been discharged.
The boy, who arrived in the United States on Saturday had a low grade fever and his results will be known later in the day, City Health Commissioner Dr Mary Travis announced.
His exposure to the virus was unclear, she said.
“He has travelled to one of the three affected countries and has a fever and that’s what triggers an assessment,” she said.
The New York Post said the boy had been vomiting and was transported from his home in the Bronx by emergency medical workers.
The latest Ebola scare came as officials announced they would be releasing nurse Kaci Hickox, held at a New Jersey hospital under the state’s Ebola quarantine policy.
State Governor Chris Christie said on Twitter the nurse did not present any symptoms and could complete her quarantine at home.
Ms Hickox arrived at Newark Liberty International Airport on Friday after treating Ebola patients in West Africa.
The nurse had earlier said she planned to challenge her quarantine in a lawsuit, saying it violated her constitutional rights.
However, after indications she would be released, her attorney said a lawsuit was unlikely.
“She was quietly happy,” said attorney Steven Hyman, who had spoken to the nurse by telephone.
“She wants this part of her ordeal to be over. She wants to return to her life.”
Ms Hickox was being transported home to Maine, the New Jersey Department of Health said in a statement.
She remained subject to the state’s 21-day mandatory quarantine, the department said.
Healthcare workers and travellers exposed to people with Ebola and who live in New York may stay in their homes for the three-week quarantine and be checked upon twice daily by healthcare professionals, New York governor Andrew Cuomo said.
He said the state would provide financial assistance if needed.
Four people have been diagnosed with Ebola in the US. The first diagnosis, a Liberian visitor to Texas in September who died, was riddled with missteps.
Two nurses who treated the man contracted the disease but recovered.
The fourth was New York doctor Craig Spencer, who was diagnosed with Ebola after he returned from treating patients in Guinea.
Now hospitalised in isolation, he had slightly improved but remained in serious but stable condition on Sunday.
The epidemic has killed nearly 5,000 people in Sierra Leone, Liberia and Guinea.
US troops returning from West Africa isolated in Italy
Meanwhile, US troops returning from West Africa are being placed in isolation at a base in Italy as a precaution to prevent the potential spread of Ebola, the Pentagon announced.
“Out of an abundance of caution, the army directed a small number of personnel, about a dozen, that recently returned to Italy, to be monitored in a separate location at their home station of Vicenza,” spokesman Colonel Steven Warren told reporters.
He added that none of the soldiers displayed symptoms of the deadly disease.
Reuters/AFP