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...