deletions | additions       diff --git a/untitled.tex b/untitled.tex  index f5c6b81..279e371 100644  --- a/untitled.tex  +++ b/untitled.tex 
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$H \equiv $ number of host cells  $B \equiv $ number of bacteria attached or invaded $ = B_a + B_i B_x  $ $\quad B_{\rm tot} \equiv $ total number of bacteria inoculated $ = B_a + B_i B_x  + B_u $ $R \equiv $ number of ruffles