Attempts to reopen country economies are hindered by fears of a second wave of infection, as a vaccine for Covid-19 has yet to be found. But the World Health Organisation has said that over 120 vaccine candidates have been proposed around the world and some have entered into clinical trials. In order to get more insight, we speak to Sam Fazeli, Senior Healthcare Analyst at Bloomberg Intelligence, about how far away we are from a vaccine, as well as who the key players are in this race.