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...