NELLIE PEYTON HOPE is rising that a new vaccine could halt the COVID-19 pandemic - for some - but lessons learnt from past vaccine programmes in West Africa suggest millions more might miss out. The super-cold storage temperature required for the new vaccine will make it near impossible to deliver in rural parts of Africa, said public health expert Evelyn Castle. "We would need all new infrastructure," said Castle, executive director of the Nigeria-based non-profit organisation eHealth Africa, which in 2016 helped distribute an Ebola vaccine in Sierra Leone at similar temperatures. "(In Sierra Leone), we had to do full…