The number of coronavirus deaths reported in the United States reached its highest total in two months, offering more evidence that the pandemic was gaining fresh momentum across the country as cooler weather sets in.

AstraZeneca’s Covid-19 vaccine accurately follows the genetic instructions programmed into AZD1222 by the developers to successfully provoke a strong immune response, according to a detailed analysis carried out by independent UK scientists.

Researchers called for more research into using blood from recovered Covid-19 patients – or so-called convalescent plasma – as a potential treatment, after a small trial of hospitalized patients in India found it was of no benefit.

Brazilian health authority Anvisa said a volunteer in a clinical trial of the Covid-19 vaccine developed by AstraZeneca and Oxford University died, stating it had received data from an investigation into the matter.

Pfizer Inc. and BioNTech SE announced the start in Japan of combined Phase I and Phase II clinical trials of their mRNA vaccine candidate against the novel coronavirus.

Researchers at Johns Hopkins Medicine identified a protein – known as factor D – that appears essential to the inflammatory process of SARS-CoV-2, the virus that causes Covid-19.

More than half of Covid-19 patients discharged from hospitals still experienced symptoms of breathlessness, fatigue, anxiety and depression for two to three months after their initial infection, according to the findings of a small UK study.

Johnson & Johnson temporarily paused the company’s Covid-19 vaccine candidate clinical trials due to an unexplained illness in a study participant, delaying one of the highest-profile efforts to contain the global pandemic.

BioSpace reviews some of the more interesting recently published scientific studies, including whether the Covid-19 virus relieve pain.

Oxford University will study whether the world’s best-selling prescription medicine adalimumab was an effective treatment for Covid-19 patients in the latest effort to repurpose existing drugs as potential coronavirus therapies.