there was  a crowdsourced  vaccine,   
  that could be created  regionally by  
    most  pharmaceutical   companies    
  without  much  effort,  and it  was   
    estimated  that   it  had   saved   
      tens      of      millions.       
 but it was not officially  recognized by 
 the world  health  organization, and  as 
 such  did not give what  the  sanctioned 
 (and   unobtainable)   ones   did:   the 
 subskin chip  that  would  let you enter 
       (or      leave)     cities.      
  and that's why, eventually, we would  
   create our  own  chips.  they  were  
  larger than the official ones, and a  
    little  unstable,   and   needed    
    maintenance.  but  they  worked!    
  or, they would  work together with a  
  little something  to make the guard   
     look    the    other     way.      
    but the scanner showed green, so...