On Jan. 16, 2021, I learned that I had tested positive for the coronavirus.

My symptoms remained mild, however, and I returned to work the following month as a reporter in the domestic news department of Kyodo News.

But from my first day back, I suffered from malaise — I felt the kind of fatigue one might experience after staying up all night. I also felt something akin to the flush of a high fever, although my temperature was normal.