This scanning electron microscope image shows SARS-CoV-2 (yellow)—also known as 2019-nCoV, the virus that causes COVID-19—isolated from a patient, emerging from the surface of cells (blue/pink) cultured in the lab. Credit: NIAID-RML

A European clinical trial involving some 3,200 people has been launched to test four possible experimental treatments against the coronavirus.

The four treatments to be studied are remdesivir, lopinavir and ritonavir in , the latter being administered with or without and hydroxychloroquine, French public health research body Inserm said in a statement on Sunday.

People taking part in the study will have been hospitalised with COVID-19 infection and are expected to be drawn from Belgium, Britain, France, Germany, Luxembourg, Spain and the Netherlands, the statement said.