inter-epidemic
adjective
in·ter-ep·i·dem·ic ˌin-tər-ˌe-pə-ˈde-mik 
variants or interepidemic
: existing or occurring between epidemics
inter-epidemic transmission
an interepidemic interval
Word History
First Known Use
1893, in the meaning defined above
Medical Definition
inter-epidemic
adjective
in·ter-ep·i·dem·ic ˈin-tər-ˌe-pə-ˈde-mik
variants or interepidemic
: occurring between epidemics of disease
inter-epidemic periods
interepidemic transmission