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...