[catch] a fever
1
to become sick with a higher body temperature, often because of an infection or illness
- She caught a fever after traveling to a tropical country.
- Don't forget to take your medication; you don't want to catch a fever.
- He caught a high fever and had to go to the hospital.
- She caught a mild fever, so she stayed home to rest.
- The children caught fevers from a flu outbreak at school.