query: #defaultView:Graph
  #Co-author network of journal articles on Zika virus or Zika fever
  select ?author1 ?author1Label ?image ?author2 where {
    ?item wdt:P31 wd:Q13442814 .
  { ?item wdt:P921 wd:Q202864 . } UNION { ?item wdt:P921 wd:Q8071861 . }
    ?item wdt:P50 ?author1 ;
          wdt:P50 ?author2 .
    optional { ?author1 wdt:P18 ?image . }
    filter not exists { filter (?author1 = ?author2) }
    SERVICE wikibase:label { bd:serviceParam wikibase:language "en" . }
  }