The phrase "is exposed" can be replaced with a variety of synonyms depending on the context. For instance, if someone's secret is revealed to the public, we can say it was "uncovered," "disclosed," or "outed." If a person is put in a vulnerable or dangerous situation, we can use terms such as "at risk," "bare," or "unsheltered." In a scientific or medical context, we might describe a person who has been exposed to a virus as "infected," "contaminated," or "afflicted." Other synonyms for "is exposed" include "revealed," "discovered," and "laid bare." Ultimately, the choice of synonym depends on the circumstances and tone of the situation.