Current guidelines for screening U.S. blood donors for symptoms of COVID-19 and for a history of recent infections are effectively protecting the blood supply from contamination with the new coronavirus, researchers say.

Months after recovery from mild Covid-19 – when antibody levels in the blood have declined – immune cells in bone marrow remain ready to pump out new antibodies against the coronavirus, researchers reported on May 24 in Nature. And according to a new U.S. study, young children appear to be significant carriers of more contagious variants of the new coronavirus, such as the ones identified in the UK and in California.

A new study by researchers at the University College London (UCL) published in Lancet Infectious Diseases finds that although the U.K. variant of SARS-CoV-2 known as B.1.1.7 is more transmissible than the wild-type, original Wuhan strain, it is likely not more deadly.

Paris-based Sanofi bought Cambridge, Massachusetts-based Tidal Therapeutics in a deal totaling $470 million.

Immunai, a company comprehensively mapping the immune system, announced a collaboration with leading life science technology company 10x Genomics.

Europe’s health regulator started a real-time review of Johnson & Johnson’s Covid-19 vaccine candidate after preliminary results showed that the shot triggered the production of antibodies and immune cells against the virus.

Researchers at Weill Cornell Medicine identified a specific and unique kind of immune cell activity in the lungs of Covid-19 patients that is different from the type of immune cell activity found in other respiratory infections.

Novartis’ IL-1β inhibitor Ilaris (canakinumab) came up short in a Phase III Covid-19 study, the company reported, following an interim analysis of data.

GlaxoSmithKline will move the company’s experimental vaccine against the respiratory syncytial virus (RSV), a cause of pneumonia in toddlers and the elderly, into the final stage of testing after experiencing encouraging mid-stage trial results.

To develop an effective treatment or vaccine for Covid-19, scientists must understand how the immune system is impacted during the disease.