California announced an app to help people track their exposure to the coronavirus, becoming the largest U.S. state to take advantage of new technology from smartphone software makers Apple Inc. and Alphabet Inc.’s Google.

President-elect Joe Biden made his selections for two key public health positions, sources said, as he prepares to take office in January while the coronavirus pandemic rages to new levels across the United States.

The United States set single-day records for new infections and deaths as California’s governor said he would impose some of the nation’s strictest stay-at-home orders in the coming days when intensive care units are expected to reach capacity.

Nearly all social gatherings of individuals from more than a single household will be banned in Los Angeles County for at least three weeks starting Nov. 30 under new restrictions unveiled by local health officials, citing a continued surge in Covid-19 infections.

A new wave of mobile apps that help track exposure to the coronavirus is coming to U.S. states ahead of the holidays as public health officials bet that recently introduced features from Apple Inc. and Alphabet Inc.’s Google will significantly boost adoption and impact.

The world is caught in a perfect storm of rising rates of chronic disease, persistent infectious diseases and public health failures that have fuelled deaths in the Covid-19 pandemic, according to a major global study of human health.

The U.S. Centers for Disease Control and Prevention (CDC) asked state public health officials to prepare to distribute a potential coronavirus vaccine to high-risk groups as soon as late October, documents published by the agency showed.

Alphabet Inc.’s Google and Apple Inc. announced a new system that will enable public health authorities to use smartphones to assist in contact tracing without having to build an app.

Former U.S. Food and Drug Administration Commissioner Scott Gottlieb criticized current FDA Commissioner Stephen Hahn’s comments to the Financial Times that he would potentially fast-track a Covid-19 vaccine before clinical trials are done if it was “appropriate.”

The U.S. government said pharmacists would be allowed to administer routine vaccines to children, calling a drop in immunization from lockdowns aimed at curbing the spread of the coronavirus a “public health threat.”