A Canadian company challenges vaccine rules to increase access 

COVID-19 vaccines are in high demand, and there aren’t enough of them. Some countries have yet to receive a single dose. In Canada, a company is testing out an unusual approach to expand the supply to places with less access. It wants to make a vaccine on its own, one that it didn’t develop. As The World’s Elana Gordon reports, this unusual move is adding to a fierce global debate about who controls vaccine knowledge and production in a pandemic.