Definition

People who continue experiencing COVID-19 symptoms months after their initial infection may be referred to as long-haulers. Long-haulers continue suffering shortness of breath, fatigue, chills, aches, and/or continued loss of taste and smell. People who were infected by COVID-19 but initially appeared asymptomatic can also become long-haulers, if symptoms begin appearing weeks or months after the person's infection.

Origin

slang.net