On December 2nd 2020 the UK authorities approved the Pfizer/BioNTech covid-19 vaccine and over 130,000 people received their first dose within 1 week. However, Moderna's vaccine had been designed by January 13th 2020, and manufactured soon after. Provide an imaginative account of how the vaccine roll out would occur under a situation of "permissionless innovation" and contrast this with a situation characterised by the "precautionary principle