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...