susceptibility
n. C / Un. the state of being easily affected, influenced, or harmed by something. If you have a high susceptibility to a cold, you catch it very easily.
n. the state or fact of being likely or liable to be influenced or harmed by a particular thing. Often describes a lack of resistance to a disease or a tendency to be emotionally affected by external factors.
Her susceptibility to allergies makes spring a difficult season.
The doctor discussed the patient's genetic susceptibility to heart disease during the annual check-up.
Researchers are investigating whether certain environmental pollutants increase the susceptibility of local wildlife to viral infections that were previously considered minor threats.
From susceptible + -ity.
Uncountable when referring to the general state of being vulnerable; countable when referring to specific types of vulnerabilities. Often followed by the preposition 'to'.