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...