（〜との）濃厚接触

close contact (with 〜)
フレーズ、名詞
※無冠詞・単数形（抽象名詞）であることに注意。

One key reason for the low number of infections recorded is that Japan has imposed strict criteria to be eligible for testing, focusing on giving tests only to people who have had sustained fevers for more than four days combined with overseas travel, close contact with an infected person or lung symptoms severe enough to warrant hospitalization.
https://www.japantimes.co.jp/community/2020/04/01/...

「濃厚接触する」はhave close contactという。
https://english-vocab-covid-19.memo.wiki/d/%a1%c1%...