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...