susceptible
sus-cep-ti-ble
adjective
Easily influenced, harmed, or affected by a particular thing or person.
"Elderly people are susceptible to the flu virus."
Thesaurus
Synonyms: waxy, impressible, impressionable, tractable, convincible, hypersensitised, supersensitive, fictile, vulnerable, predisposed, unresistant, amenable
Antonyms: insusceptible, unsusceptible