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...