the fact of experiencing something or being affected by it for a second, third, etc. time because of being in a particular situation or place

A periodic re-exposure to the pathogen is of fundamental value for effectively maintaining high levels of immunity. 定期重新接触病原体对于有效维持高水平的免疫力具有重要意义。

Sunburn can make you feel very unwell, so have lots of rest, eat lightly, and avoid re-exposure to the sun for at least the next day.

The sources of lead exposure need to be identified if exposures and re-exposures are to be prevented.