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...