The number of new Covid-19 cases in the United States last week rose 13% to more than 393,000, approaching levels last seen during the summer peak, according to a Reuters analysis.

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.

First U.S. novel coronavirus reinfection case identified in Nevada study (Reuters) – Researchers for the first time have identified someone in the United States who was reinfected with the novel coronavirus, according to a study that has not yet been reviewed by outside experts. The report, published online, describes a 25-year-old man living in Reno, […]

The number of new cases of the novel coronavirus reported in the United States fell 17 percent, the fifth straight week of declines, according to a Reuters tally of state and county reports.

Florida and four other states recorded daily highs for cases of COVID-19 on Saturday, highlighting the worsening spread of the coronavirus in parts of the U.S. South and West, prompting some officials to roll back their reopening plans.

Americans sunbathed on beaches, fished from boats and strolled on boardwalks this holiday weekend, but the occasional person wearing a mask was a constant reminder that the world is still battling the coronavirus pandemic.

Litigation against OxyContin maker Purdue Pharma LP intensified as six more U.S. states announced lawsuits.