One interesting item is that Spanish has three words to refer to the flu. Influenza is the most formal of the three. But gripe and gripa, both feminine nouns, are also very common. Gripe is the more common of the two and is usually used in writing. Gripa is used frequently in Mexican and Colombian speech.
el brote — outbreak (in this context)
un caso (de enfermedad) — case (of disease)
el cubrebocas. la máscara facial — face mask
el dolor — ache, pain
la enfermedad — illness
la epidemia — epidemic
la gripe, la gripa — flu, influenza
la infección — infection
infectar — infection
la influenza — flu, influenza
la influenza/gripe/gripa aviar/aviara — bird flu
la influenza/gripe/gripa porcina — swine flu
la medicina, el medicamento — medicine
la muerte — death
la mutación — mutation
la pandemia — flu, pendemic
el pronóstico — prognosis
propagar, la propagación — to spread (a disease), spread (of a disease)
respiratorio — respiratory
la salud — health
la salud pública — public health
el tipo A — Type A
el virus, los virus — virus, viruses
Note also that in the Mexican media, Distrito Federal (Federal District) is frequently used to refer to Mexico City.

