[R-sig-Epi] Reference Guide / Howto

[Wim Bertels]

Hi,

does anyone know a good reference guide/book/howto on how to study
in a proper way:
"characterize variability in local epidemics using data such as age,
gender, country of birth, country of infection, viral load, .."

And a guide or book 
with good practices in epidemilogy is also interesting.

Using R

tnx,