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...