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...