The head of drugmaker Moderna said COVID-19 vaccines are unlikely to be as effective against the Omicron variant of the coronavirus as they have been previously, sparking fresh worry in financial markets about the trajectory of the pandemic.

With companies like GlaxoSmithKline and bluebird bio moving closer to splitting their businesses into multiple entities, Novartis is reviewing the Swiss drugmaker’s Sandoz division to determine the best moves going forward to maximize value for shareholders.

The world is at risk of losing hard-won gains in fighting Covid-19 as the highly transmissible Delta variant spreads, but WHO-approved vaccines remain effective, the World Health Organization said on July 30.

A senior Chinese epidemiologist said the United States should be the priority in the next phase of investigations into the origin of Covid-19 after a study showed the disease could have been circulating there as early as December 2019, state media said on June 17.

Top U.S. infectious disease expert Dr. Anthony Fauci called on China to release the medical records of nine people whose ailments might provide vital clues into whether Covid-19 first emerged as the result of a lab leak, the Financial Times reported on June 3.

The Covid-19 vaccine of AstraZeneca Plc and Oxford University works well as a third booster dose, stepping up antibodies to the coronavirus spike protein among participants in a study, the Financial Times said on May 19.

Leaked documents from provincial and municipal governments in China reveal a slew of previously unreported severe adverse events related to Covid-19 vaccines made and administered in China.

Japan’s government is considering a state of emergency for Tokyo and Osaka as new Covid-19 case numbers surge, broadcaster NHK reported on Wednesday, a move that would enable prefectural authorities to impose curbs to try to stop infections spreading.

Brazil’s richest and most populous state, Sao Paulo, warned its ability to care for seriously ill Covid-19 patients was on the verge of collapse as it ran perilously low on key drugs, according to a letter to the federal government seen by the Folha de Sao Paulo newspaper.

To challenge the status quo reporting of mass-shootings, the Columbia Journalism Review (CJR) is bringing together some of the biggest names in journalism to help chart a new path forward for covering mass shootings.