Drugmakers and research centers around the world are working on Covid-19 vaccines, with large global trials of several of the candidates involving tens of thousands of participants well underway.

As some companies close in on unveiling their initial findings — with Canadian and European regulators already reviewing early data on some vaccines — the following is what we know about the race to deliver vaccines to help end the coronavirus pandemic that has claimed over a million lives:

Who is furthest along?

US drugmaker Pfizer Inc with German partner BioNTech, US biotech Moderna Inc and Britain-based AstraZeneca in conjunction with University of Oxford researchers could provide early analyses of data from their various large trials over the next two months. Johnson & Johnson is not far behind.

Read more here.