Coronavirus

Unexpected evidence that SARS-CoV-2 can integrate its genetic material could explain puzzling diagnostic tests in recovered COVID-19 patients

Extra chromosome carries key genes that may work against them

Rich countries snapped up limited supplies, so protection will lag for others

Nation already suffers from high rate of bacterial disease

Unexpected immune response to HIV protein fragment in vaccine produced antibodies that could confuse screening tests for the AIDS virus

Despite a few misgivings,the advisory body said the vaccine’s strong efficacy clearly made its benefits greater than its risks

Hugo López-Gatell Ramírez bolstered the country’s health system but rejected universal testing

UAE health ministry reports 86% protection against infections in trial, but offers little data

The federal government may set vaccine priorities, but one leader of a hospital system says she and others on the ground need flexibility to allocate limited doses

But decision to prioritize failed hydroxychloroquine treatment draws criticism

Serum Institute of India rejects link between its vaccine and neurological symptoms—but declines to provide details

Rollout may start next week, prioritizing health workers, the elderly, and other vulnerable populations

Health workers and residents and staff of long-term care facilities top the list; tougher decisions lie ahead

Biotech will ask FDA for emergency approval as final results from efficacy trial back up initial claim of vaccine success

HHS Protect data, which influence how pandemic supplies and support are allocated, conflict with state or other federal data, Science has found

On this week’s show: What we’ve learned about keeping schools safe during a pandemic, what triggers the timing of fall leaves, and a book about what nature does when confronted with crisis