Biology — Vaccination & Immune Memory

{
  "elements":[
    {"data":{"id":"vac","label":"Vaccine (antigen)"}},
    {"data":{"id":"primary","label":"Primary response"}},
    {"data":{"id":"mem","label":"Memory cells"}},
    {"data":{"id":"expose","label":"Real pathogen exposure"}},
    {"data":{"id":"secondary","label":"Secondary response"}},
    {"data":{"id":"fast","label":"Fast, large antibody response"}},
    {"data":{"id":"immune","label":"No illness (immunity)"}},
    {"data":{"source":"vac","target":"primary"}},
    {"data":{"source":"primary","target":"mem"}},
    {"data":{"source":"expose","target":"secondary"}},
    {"data":{"source":"mem","target":"secondary","label":"recognise"}},
    {"data":{"source":"secondary","target":"fast"}},
    {"data":{"source":"fast","target":"immune"}}
  ],
  "layout":{"name":"breadthfirst","directed":true}
}