(Reuters)

People hospitalised for flu should be tested for bird flu within 24 hours, the US Centers for Disease Control and Prevention said on Thursday (January 16) in an expansion of the agency’s efforts to tackle ongoing infections in humans.

The advisory is intended to prevent delays in identifying human infections with avian influenza A (H5N1) viruses amid high levels of seasonal influenza.

The risk to the general public from bird flu is low, and there has been no further evidence of person-to-person spread, the agency said.

Influenza A-positive patients, particularly those in an intensive care unit, should be tested ideally within 24 hours of hospitalization to identify the viral subtype, the agency said.

Prior to Thursday’s guidance, hospitals sent batches of samples to labs for subtyping every few days.

The CDC does not believe it has been missing bird flu infections in people, said Nirav Shah, the agency’s principal deputy director, on a call with reporters.

“The system is working as it should. We just want to accelerate that system so we can get results sooner for public health action,” Shah said.

Nearly 70 people in the United States, most of them farmworkers, have contracted bird flu since April, as the virus has circulated among poultry flocks and dairy herds.

Most infections in humans have been mild, but one fatality was reported in Louisiana last week.

The Department of Agriculture has more than 300 personnel working on its bird flu response and has spent US$1.5 billion on its efforts to curb the spread among poultry and dairy cattle, said Eric Deeble, a deputy under secretary at the agency.

The CDC last week said it would rebuild a bird flu vaccine stockpile for poultry.

Officials at the Department of Health and Human Services, which encompasses CDC, have repeatedly met with the transition team of the incoming Donald Trump administration on Zoom calls and have shared their bird flu playbook, officials said on the press call.