anchor.diff:  country,current_zika_transmission
   American Samoa,Widespread transmission
  -Anguilla,Sporadic transmission
   Argentina,Widespread transmission
   Aruba,Widespread transmission
   Barbados,Widespread transmission
   Belize,Widespread transmission
   Bolivia,Widespread transmission
  -Bonaire,Sporadic transmission
  +Bonaire,Widespread transmission
   Brazil,Widespread transmission
   Cape Verde,Widespread transmission
   Colombia,Widespread transmission
  
positive.code: El Salvador,Widespread transmission
  Fiji,Widespread transmission
  French Guiana,Widespread transmission
  Grenada,Sporadic transmission
  Guadeloupe,Widespread transmission
  Guatemala,Widespread transmission
  Haiti,Widespread transmission
  Honduras,Widespread transmission
  Indonesia,Sporadic transmission
  Jamaica,Widespread transmission
  Marshall Islands,Widespread transmission
  Martinique,Widespread transmission
  Mexico,Widespread transmission
  "Micronesia, Federated States of",Widespread transmission
  
negative.code: Trinidad and Tobago,Widespread transmission
  US Virgin Islands,Widespread transmission
  Venezuela,Widespread transmission
  Anguilla,Sporadic transmission
  Grenada,Sporadic transmission
  ​Guinea-Bissau,​Sporadic transmission
  Indonesia,Sporadic transmission
  Philippines,Sporadic transmission
  Sint Eustatius,Sporadic transmission
  