The World Health Organization urged rich countries on May 14 to reconsider plans to vaccinate children and instead donate Covid-19 shots to the COVAX scheme that shares them with poorer nations.

The origin of the novel coronavirus is still unclear and the theory that it was caused by a laboratory leak needs to be taken seriously until there is a rigorous data-led investigation that proves it wrong, a group of leading scientists said.

New mutations, or variants, of the SARS-CoV-2 virus that causes Covid-19 are continuing to be discovered. Health officials in Florida cited a new mutation of the Brazilian strain (P.1) that they are calling P2 or P.1.1.

In a roundup of some of the latest scientific studies on the novel coronavirus and efforts to find treatments and vaccines for Covid-19, researchers found when a new monoclonal antibody drug was added to treatments being given to hospitalized Covid-19 patients who were still breathing on their own, Humanigen Inc.’s lenzilumab significantly improved their odds of not needing invasive mechanical ventilation.

The Centers for Disease Control and Prevention (CDC) published updated guidance communicating to the public that the coronavirus disease 2019 is an airborne threat, explicitly stating that transmission and subsequent infection with the novel coronavirus can occur via inhalation of very fine respiratory droplets as well as aerosolized particles. 

The governors of two more U.S. states said on May 6 they were lifting most restrictions that were put in place to combat the spread of the novel coronavirus after sharp drops in infection rates and deaths.

Fujifilm Holdings Corp. said on April 21 the company started a new phase III trial in Japan of the drug Avigan for Covid-19, reviving hopes for a home-grown treatment for the virus.

According to separate studies, blood type does not affect susceptibility to Covid-19 in U.S. patients and an inhaled steroid commonly used to treat asthma can help keep patients with mild Covid-19 from getting sicker.

Shares of Inovio climbed in trading after the company announced its DNA vaccine candidate for Covid-19 induced a robust T-cell response against multiple variants of the SARS-CoV-2 virus.

The United States delivered about 3 million Covid-19 vaccine doses per day on average over the past week, up 8% over the previous 7-day average, U.S. Centers for Disease Control and Prevention Director Rochelle Walensky said on April 7.