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...