| Subject | English | Spanish |
| IMF. | avian flu | gripe aviaria |
| UN, biol., sec.sys. | avian flu | gripe aviar |
| IMF. | avian flu pandemic | pandemia de gripe aviar |
| IMF. | bird flu | gripe aviaria |
| health., anim.husb. | bird flu | gripe aviar |
| health., anim.husb. | bird flu | influenza aviar |
| vet.med. | chicken flu | catarro contagioso laringotraqueobronquial de las aves Tarpeia avium |
| vet.med. | chicken flu | laringotraqueítis infecciosa aviar Tarpeia avium |
| med. | flu grippe | gripe endémica |
| med. | flu grippe | gripe nostras |
| med. | flu grippe | influenza |
| med. | flu grippe | fiebre catarral aguda |
| med. | flu grippe | gripe |
| health. | flu-like symptom | cuadro pseudo-gripal |
| health. | flu pandemic | pandemia gripal |
| med. | flu vaccine | vacuna antigripal |
| med. | flu vaccine | vacuna antigripal humana para la temporada |
| med. | flu vaccine | vacuna antigripal para la temporada |
| med. | gastric flu | gastroenteritis |
| gen. | gastric flu | inflamación del estómago y del intestino delgado |
| health. | 2009 H1N1 flu | gripe norteamericana |
| health. | 2009 H1N1 flu | nueva gripe por virus AH1N1 |
| health. | 2009 H1N1 flu | gripe pandémica H1N1 2009 |
| health. | 2009 H1N1 flu | gripe AH1N1v |
| health. | H1N1 flu | gripe por virus AH1N1 |
| health., agric. | hog flu | pneumonía enzootica de los lechones |
| health., anim.husb. | hog flu | gripe porcina |
| health., agric. | hog flu | tos del cemento |
| health., agric. | hog flu | gripe de los lechones |
| nat.sc., health., anim.husb. | hog flu | gripe del cerdo (influenza suum) |
| med. | Hong Kong flu | gripe asiática |
| UN, biol., sec.sys. | human bird flu | gripe aviar humana |
| health. | Mexican flu | gripe norteamericana |
| health. | Mexican flu | nueva gripe por virus AH1N1 |
| health. | Mexican flu | gripe pandémica H1N1 2009 |
| health. | Mexican flu | gripe AH1N1v |
| health. | North American flu | nueva gripe por virus AH1N1 |
| health. | North American flu | gripe norteamericana |
| health. | North American flu | gripe pandémica H1N1 2009 |
| health. | North American flu | gripe AH1N1v |
| med. | novel flu virus | nuevo virus gripal AH1N1 |
| health. | novel H1N1 flu | gripe norteamericana |
| health. | novel H1N1 flu | gripe pandémica H1N1 2009 |
| health. | novel H1N1 flu | gripe AH1N1v |
| health. | novel H1N1 flu | nueva gripe por virus AH1N1 |
| health. | pandemic flu | gripe pandémica |
| nat.sc., health., anim.husb. | pig flu | gripe del cerdo (influenza suum) |
| IMF. | Spanish flu | gripe española |
| health., anim.husb. | swine flu | gripe porcina |
| health., med. | yuppie flu | enfermedad de los "yuppies" (encephalomyelitis myalgica) |
| health., med. | yuppie flu | encefalomielitis miálgica (encephalomyelitis myalgica) |
| health., med. | yuppie flu | síndrome de fatiga crónica (encephalomyelitis myalgica) |