diff --git a/README.md b/README.md
index 6a624b6..01c074a 100644
--- a/README.md
+++ b/README.md
@@ -86,9 +86,10 @@ $ ./calc_ifr.py
 IFR on target country assuming disease prevalence equal among ages:  0.658%
 ```
 
-However the average IFR is highly dependent on factors other than age:
-varying prevalence among age brackets, availability of healthcare, population
-health, etc, so this estimate should be interpreted with caution.
+However the average IFR is highly dependent on factors other than age: varying
+prevalence among age brackets, underlying health conditions, access to
+healthcare, socioeconomic status, ethnicity, etc, so this estimate should be
+interpreted with caution.
 
 [sero]: https://portalcne.isciii.es/enecovid19/ene_covid19_inf_pre2.pdf
 [daily]: https://www.mscbs.gob.es/profesionales/saludPublica/ccayes/alertasActual/nCov-China/documentos/Actualizacion_120_COVID-19.pdf