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...