ADJ

nasty
flu, stomach, tummy

VERB + BUG

have
catch, come/go down with, get, pick up

BUG + VERB

go around/round
A stomach bug has been going round at school
strike sb down

PREP

with a/the ~
off work with a flu bug

VERB + BUG

be bitten by, catch, get
She's been bitten by the travel bug

BUG + VERB

bite (sb)

ADJ

minor, slight
computer, software