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...