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...