Vaccine winnersMany traders see defeating the virus as a prerequisite to a nation rebooting its economy, and thereby bolstering its currency, elevating the importance of a successful -- and quick -- vaccine rollout.For example, Australia’s dollar took a dive versus its New Zealand peer last week after Germany cast doubt on the effectiveness of AstraZeneca Plc’s Covid-19 shot, which forms part of Australia’s vaccination program.But nowhere is the relationship between currencies and the vaccine clearer than in the UK Britain ranked near the top of a Bloomberg study of three variables: cumulative progress in vaccinations and pace of rollouts, offset by the rate of virus infections.As of Wednesday, the UK had administered 15.8 doses per 100.