WHO Solidarity vaccine trial (Achieving rapid progress towards global objectives) :

• Evaluating several different candidate vaccines:

      Increasing the likelihood of finding several effective vaccines

• Expenditiously enrolling people at sites with high rates of COVID-19:

      Rapid accumulation of data to support rigorous evaluation

• Eliminating inefficiency of design and conduct of separate trials:

     Results within 3-6 months after each vaccine is ready for inclusion

• International collaboration and country commitment:

      Fosters international deployment with equity of access