Researchers have developed a new compound that can prevent long COVID symptoms in mice that could lead to a future drug for the debilitating condition in humans. Developed by researchers at the Walter and Eliza Hall Institute of Medical Research (WEHI) in Melbourne, the world-first study found mice treated with the antiviral compound were protected from long-term brain and lung dysfunction, which are key symptoms of long COVID.

COVID-19 has continued to alarm public health, and although several therapeutics and vaccines have been developed, the development of effective vaccines or antibodies is challenging due to mutations in the surface of the spike protein in the SARS-CoV-2 virus.

Multisystem inflammatory syndrome in children (MIS-C), a serious disorder that develops after SARS-CoV-2 infection, could arise from latent infection of another pathogen, the Epstein-Barr virus (EBV). Researchers at Charité – Universitätsmedizin Berlin and the German Rheumatology Research Center (DRFZ) have linked the inflammatory effect of this co-infection with transforming growth factor β (TGF-β), ruling out the possibility that MIS-C is caused by an autoimmune reaction, or persistence of the coronavirus in the body.

Although several vaccines and drugs are available against SARS-CoV-2, the search for effective therapeutic agents for COVID-19 and future zoonotic coronaviruses continues. The RNA-dependent RNA polymerase (RdRp) is a relevant drug target in several RNA viral infections, such as SARS-CoV-2 (targeted by the approved drugs remdesivir and molnupiravir), hepatitis C, influenza and dengue viruses.

In 2020, the Conference on Retroviruses and Opportunistic Infections (CROI) was the first scientific conference to move from in-person to virtual due to the COVID-19 pandemic. On the fifth anniversary of the virtual conference, and the pandemic, some of those earliest COVID-19 patients have still not recovered.