catching
communicable
contagious
contaminating
contractable
corrupting
infected
septic
transmissible
transmittable
catchy
contaminative
deadly
demoralizing
destructive
endemic
envenomed
epidemial
epidemic
epiphytotic
epizootic
infective
inoculable
irresistible
malign
malignant
mephitic
miasmal
miasmatic
miasmic
noxious
pandemic
pestiferous
pestilent
pestilential
poisonous
sporadic
spreading
sympathetic
taking
toxic
toxicant
toxiferous
venenate
veneniferous
venenous
venomous
virulent
vitiating
zymotic
autoimmune
chronic
debilitate
disconcert
incurable
inflammatory
lethal
pathogenic
recurrent
respiratory
systemic
uncontrollable
unpleasant
viral