Analyses suggest the virus has been silently spreading in nearby counties since May.

Parts of Southeast Asia where human and bat population densities are highest could be infection hotspots, a study finds.

FEMA official Robert Fenton and a deputy are charged with increasing access to tests, vaccines, and treatment.

Two independent groups suggest the suite of recent unexplained hepatitis cases may stem from coinfection with an adeno-associated virus and a helper adeno- or herpesvirus, a duo which may be especially virulent in children with a particular genetic variant.

Preliminary testing indicates that the two people died from the Ebola-like virus, the World Health Organization says.

The longer and farther the virus spreads, the more likely it could become endemic in new areas, says UCLA epidemiologist Anne Rimoin.

Two strains of monkeypox have been detected in the US, suggesting the virus has been circulating in the country for some time, the CDC says.

Experts are scrambling to understand clusters of the normally rare disease that have been reported in Europe and North America in the last month.

So far this season, tens of millions of birds have died of disease or been culled, driving up prices of eggs, chicken, and turkey meat.

The Scientist spoke with the UK’s chief veterinary officer, Christine Middlemiss, about this winter’s high bird flu prevalence, the effects of the disease, and efforts to combat it.

The pathogen known as swine flu evolved in pigs in Mexico following imports of the livestock from the US and Europe.

Seven years of surveillance and research revealed the complex history of the H1N1 virus that leapt from pigs to humans and sparked the global swine flu outbreak.

Ebola virus was detected in samples from a child who died last week, the World Health Organization and Democratic Republic of the Congo’s Ministry of Health announce.

Officials say it’s not yet clear whether this case is linked to an outbreak in Guinea earlier this summer.

Surveillance networks set up to detect outbreaks among pets could one day have public health uses too.  

A patient caught the rare disease in Nigeria before flying through two US airports, exposing more than 200 people from 27 states.

In addition to continued scruitiny of the SARS-CoV-2 virus, research on similar pathogens could aid in the fight against the COVID-19 pandemic and future disease outbreaks.

Genetic analyses suggest that the virus came from a patient who survived the 2013–2016 West African outbreak.

The woman may have had a link to another person, who was married to an Ebola survivor and who died a few days previously in Democratic Republic of Congo.