A person who has tested negative (generally indicating no infection was detected).
検査の結果、陰性者は参加可能だと通知された。
After the test results, negative individuals were notified that they could participate.
陰性者でも予防策を続けるように指示が出た。
Even those who tested negative were instructed to continue preventive measures.
空港で陰性者の証明書を確認された。
At the airport, proof of a negative test was checked.