The US Centers for Disease Control and Prevention is urging hospitals to accelerate advanced testing of people they suspect may have bird flu.

CDC officials say medical professionals are seeing more patients whose illness cannot be traced back to an infected animal or bird.

A child ill with fever and conjunctivitis in San Francisco tested positive for bird flu but had no known source of transmission.

The CDC is now calling for subtyping of influenza A viruses in all hospitalized patients -- and on an accelerated timeline, ideally within 24 hours. Nirav Shah, MD, JD, principal deputy director of the CDC,

Officials from the Centers for Disease Control and Prevention (CDC) recommend that hospitals speed up testing people who are hospitalized with the flu for H5N1 bird flu. Health care workers in

Rates of norovirus in that CDC system have reached levels at or above last season's peak in all regions of the country. Norovirus test positivity rates look to be the worst in the Midwest, in a grouping of states spanning Kansas through Michigan.

RSV cases peaked earlier this month, but experts ask people to remain vigilant in preventing its spread. RSV is a respiratory infection, most common in young children and newborns.

The Centers for Disease Control and Prevention says hospitals treating people for the flu should test them for avian influenza within 24 hours.

A fire in the world’s largest lithium battery storage plant in northern California continued to burn on Friday, releasing toxic smoke into the atmosphere. It prompted the evacuation of around 1,700 people and the closure of a major highway.

Moderna has been awarded approximately $590 million from the federal government to help speed up the development of an mRNA-based bird flu vaccine, health officials said.

The first bird flu outbreak at a commercial poultry operation in Georgia was recently confirmed, as human cases continue to climb nationwide.