The following is a roundup of some of the latest scientific studies on the novel coronavirus and efforts to find treatments and vaccines for Covid-19, the illness caused by the virus.

Higher death risk found if Covid-19 causes changes to heart

A new study may help identify which Covid-19 patients with signs of heart injury are at higher risk for death. Doctors looked at 305 hospitalised patients with elevated levels of troponin, a protein released when the heart has been injured.