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International study estimates actual and optimal use of WHO AWaRe Access, Watch, and Reserve antibiotic classes in 186 countries and regions.

A food-safety roundup covers a growing multistate cyclosporiasis outbreak including thousands more reported sickened and 2 deaths tied to iceberg lettuce, a Salmonella Javiana outbreak with hundreds of cases across 27 states linked to jalapeño peppers served at Chipotle and QDOBA, and the US suspension of avocado inspections in Michoacan, Mexico.

The FDA has approved Moderna's influenza vaccine and set a Prescription Drug User Fee Act (PDUFA) date for Merck's RSV immunization product for expansion for a second season.

A phylodynamic analysis combining Arizona wild bird surveillance with national sequence data found the H5N1 D1.1 genotype spread in a stepwise pattern among adjacent US flyways during fall 2024, with limited direct exchange between the Pacific and Atlantic flyways.

A serologic study of patients in northwestern Italy found hantavirus antibodies in 7.3% of samples tested, with neutralization data suggesting Puumala virus as the likely infecting strain in a region where rodent-borne viral infections are rarely diagnosed.

A real-world analysis of the OPERA cohort found no HIV infections among 315 women using long-acting cabotegravir for PrEP, despite frequent short delays in maintenance injections, reinforcing the regimen's real-world effectiveness.

Week 96 data from the LATA trial show Cabenuva was superior to daily oral therapy in adolescents with HIV, while new real-world OPERA cohort data reinforce comparable effectiveness in adults, both presented at AIDS 2026.

An oral antiviral candidate blocked airborne and direct-contact transmission of a measles-like virus in ferrets, offering a potential new outbreak-control tool as US measles cases hit a 35-year high.

Atea Pharmaceuticals' bemnifosbuvir/ruzasvir combination met its primary endpoint of noninferiority to sofosbuvir/velpatasvir in the phase 3 C-BEYOND trial, achieving comparable cure rates for hepatitis C with as little as 8 weeks of treatment.

Several combination products are currently in development for people with HIV. Here is a review of these treatments.

Despite competing national crises drawing attention elsewhere, experts warn that the ongoing H5N1 avian influenza outbreak in birds, cattle, and humans in the United States highlights critical gaps in surveillance, worker protections, and pandemic preparedness that must be addressed to prevent a future pandemic.

FDA's acting deputy commissioner for food said the US food supply remains safe even as CDC-confirmed cyclosporiasis cases climbed past 11,000, while a new survey found nearly half of Americans don't trust the agency to manage the outbreak.

Sharon Nachman, MD, chief of pediatric infectious disease at Stony Brook Children's Hospital, explains why local resistance data, not just global forecasts, should drive today's empiric antibiotic choices in children.