Canada, the US, the UK, and the EU all blocked a measure that would have allowed poor and developing nations to begin to make their own vaccines. These countries blocked it because "they are concerned that freeing intellectual property, even temporarily, could reduce the incentives for corporate research."  

Source: https://qz.com/1983767/the-wto-is-choosing-pharmaceutical-profits-over-global-immunity/  

The Rational National video on Canada's vaccine rollout: https://www.youtube.com/watch?v=iKSWJB48XhE