Coronavirus Q&A: What have we learned since the pandemic began?

Student EMT Ruth Corscadden, left, and paramedic Daniel McCollam wearing full PPE during their shift for the Northern Ireland Ambulance Service covering the Northern Trust’s hospitals. Picture: Liam McBurney/PA

In November 2019, little was known about a mysterious disease first identified in the city of Wuhan in China. 

There has now been over 100m cases confirmed around the world, and 2.1m people have died after contracting the virus.