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...