Four more health-care workers who tended to a person hospitalized with H5N1 bird flu have revealed that they had respiratory ...

More than a month after a person in Missouri mysteriously fell ill with H5-type bird flu, investigators in the state are ...

Seven people in contact with a patient hospitalized with bird flu also developed symptoms, the C.D.C. reported. Some are ...

Testing is ongoing among five health care workers and a household member exposed to the infected person who all came down ...

The bird flu may be entering a dangerous new phase. The risk that any given person will be sickened or die remains low, but ...

"Even sporadic cases of human-to-human transmission indicate a big change in the virus and suggest it is exploring new ...

For influenza viruses, imperfection is a strength. They constantly mutate, producing new strains that challenge immune ...

Experts call for greater testing of contacts of a person who was infected with the H5N1 bird flu strain before the virus ...

Oseltamivir has a controversial past. Governments around the world have spent billions of dollars to stockpile the drug since ...

The latest human case of bird flu in the U.S. occurred in a patient with no reported exposure to affected animals, sparking ...

What is known so far about the human cases of bird flu in the U.S. is enough to worry those who spend their professional days ...

Dhillon is an instructor in the Division of Global Health Equity at Brigham and Women’s Hospital and Harvard Medical School.