World Health Organisation’s (WHO) list.A recent health policy opinion piece, published in The Lancet on 12 February, reviews four interconnected challenges to the success of vaccination schemes: production, affordability, allocation, and deployment of the vaccines.Stay informed with live updates on the current COVID-19 outbreak and visit our coronavirus hub for more advice on prevention and treatment.Public health policy, vaccination, and infectious disease experts from the United Kingdom, United States, Thailand, and Singapore co-wrote the paper, making a series of recommendations.“Several manufacturers have successfully developed COVID-19 vaccines in under 12 months, an extraordinary achievement.