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...