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...