<prompt> Translate the following text to SwahiliTwenty three leading institutes all over the world, including the New Contagious Diseases Research Centre were busy working on the vaccines development.  <response>: Taasisi 23 za kimataifa, ikiwa ni pamoja na Kituo cha Utafiti wa Magonjwa Mapya ya Kuambukiza, zilikuwa zikifanya kazi ya kuunda chanjo hiyo. 