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...