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...