New analysis refutes James Watson’s claim he was first to recognize significance of famed photograph 51

Companies striving to reduce continent’s reliance on foreign shots must overcome major financial and logistical challenges

Early data shows South Africans and Zambians have a big appetite for the twice-yearly HIV prevention injection. But clinics don’t yet have enough doses for everyone who wants it. It’s a balancing act: how do you persuade people to want a new medicine when there isn’t enough of it to go around?

David Morens awaits sentencing after admitting to trying to avoid Freedom of Information Act requests

Researchers who study HIV, tuberculosis, and other infectious disease in the country welcome policy change

Services for mothers and children continue to suffer in the meantime

One shot of lenacapavir can protect for 6 months—but aid cuts and uncertain demand mean little drug has reached the countries that most need it

Defendants face up to 5 years prison for alleged “smuggling” and “conspiracy”

Existing vaccines may offer some protection against the rare strain now circulating—but the evidence is scant

GSK’s “bepi” performs better than expected in efficacy trials, but its global impact is likely limited

Jeffery Taubenberger’s departure from a leadership position caps year of upheaval at National Institute of Allergy and Infectious Diseases

Small monkey experiments raise some hopes—and many questions

Testing, sequencing, and clinical trial efforts spring to life as Bundibugyo virus spreads

Alejandro Arteaga’s efforts to identify and protect tropical reptiles and amphibians have entangled him in controversy

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No vaccines or treatments exist for Ebola Bundibugyo, which has caused hundreds of suspected cases and 80 deaths in Congo and Uganda; WHO warns of

HHS memo says Ralph Baric had a “pattern of deception” in describing virus studies long before pandemic

Past studies of Andes virus offer scant evidence on transmission risks, and have sparked debate

State Department would send PEPFAR money directly to countries, which could then pay fees to health agency for help

Bhattacharya publicly slams vaccine study he pulled from agency’s flagship publication

Timmy, a humpback whale stranded in Germany 6 weeks ago, was ailing and may already be dead

Six animals suppressed AIDS virus after one shot of treatment that makes cell-receptor antibody

David Morens, 78, was stripped and handcuffed for email violations

David Morens faces decades in prison for allegedly concealing back-channel efforts to help nonprofit accused of starting pandemic

Before antiretroviral drugs reached South Africa, high death toll shaped immune system genes

Agency’s temporary director says Mortality and Morbidity Weekly Report needs external reviewers

Global Fund and U.S. government plan to make injectable lenacapavir available to 3 million people by 2028

Decades of observations tracked the fraying of once-friendly relations among Ugandan chimpanzees

Science advocates urge Congress to reject 2027 budget plan

The Department of State hasn’t given the Centers for Disease Control and Prevention all the money it needs to keep vital AIDS relief programs operating

Researchers still aren’t sure how H5N1 influenza spreads between cows and from farm to farm

Analysis of Wuhan market map suggests China has not disclosed some of the earliest infections in animals and people

Strategy gains momentum after promising results in cell studies and infected people

Stanley Plotkin, the 93-year-old "godfather of vaccines," is watching his field’s achievements slip away.

Large-scale study finds that simplifying delivery of prevention medication and improving connections to clinics is key

Features of recently identified influenza D point to possible pandemic threat

Dead cat led to discovery, but officials stress no further spread of H5N1 has been detected

Scientists welcome GSK announcement that two trials succeeded—even though data are still lacking