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...