Kodansha Comics licensed the manga, and it released the third volume on July 13. The company describes the story:
It's no easy feat to keep a body happy and healthy, so even the newest cells have their tiny-winey, chubby-wubby hands full! Join these cute baby cells as they work hard within their newborn baby body, in this newest (literally!) spinoff of Cells at Work!
Fukuda launched the manga in Morning in October 2019. Kodansha released the manga's third compiled book volume on February 22.
The manga went on hiatus in June 2020. The series then went on hiatus again in February, and returned on September 2.
Source: Morning issue 43