anchor.diff:  country,areas,current_zika_transmission
  -American Samoa,,Areas with virus transmission following virus new/re introduction (WHO cat. 1)
  +American Samoa,,Areas with interrupted transmission (WHO cat. 3)
   Angola,,Areas with virus transmission following virus new/re introduction (WHO cat. 1)
   Anguilla,,Areas with virus transmission following virus new/re introduction (WHO cat. 1)
   Antigua and Barbuda,Areas with virus transmission following virus new/re introduction (WHO cat. 1),
  
positive.code: Argentina,Tucuman,Areas with virus transmission following virus new/re introduction (WHO cat. 1)
  Argentina,Formosa,Areas with virus transmission following virus new/re introduction (WHO cat. 1)
  Argentina,Salta,Areas with virus transmission following virus new/re introduction (WHO cat. 1)
  Aruba,,Areas with virus transmission following virus new/re introduction (WHO cat. 1)
  Bahamas,,Areas with virus transmission following virus new/re introduction (WHO cat. 1)
  Bangladesh,,Areas with virus transmission following previous virus circulation (WHO cat. 2)
  
negative.code: "Bonaire, Sint Eustatius and Saba",Sint Eustatius,Areas with virus transmission following virus new/re introduction (WHO cat. 1)
  Brazil,Rio De Janeiro,Areas with virus transmission following virus new/re introduction (WHO cat. 1)
  Brazil,Maranhao,Areas with virus transmission following virus new/re introduction (WHO cat. 1)
  Brazil,Bahia,WHO cat. 2 areas with new documented intense transmission
  Brazil,Rio Grande Do Norte,Areas with virus transmission following virus new/re introduction (WHO cat. 1)
  Brazil,Alagoas,Areas with virus transmission following virus new/re introduction (WHO cat. 1)
  Brazil,Amazonas,Areas with virus transmission following virus new/re introduction (WHO cat. 1)
  