A Russian state virology institute has started human trials of the country’s second potential Covid-19 vaccine, injecting the first of five volunteers with a dose on July 27, the RIA news agency reported.

The individual was feeling fine, the agency reported.

The next volunteer in the trial by the Vector virology institute in Siberia would receive an injection on July 30, RIA cited consumer safety watchdog Rospotrebnadzor as saying.

The trial is then expected to scale up to 100 volunteers between the ages of 18 and 60, the clinical trials register shows. Vector is working on six different potential Covid-19 vaccines, according to World Health Organisation records.