The February 2021 issue of Kodansha’s Nakayoshi magazine has published a special chapter for Haruyuki Yoshida’s Cells at Work: Bacteria! (Hataraku Saikin) spin-off of Akane Shimizu’s Cells at Work! (Hataraku Saibō) manga, under the title Hataraku Saikin NEO. A new chapter will publish on the Palcy manga app around February 2021.
The story of the manga is described as:
Cells are not the only things at work in your body. Deep in your gut, a war rages… between good bacteria, bad bacteria, and opportunistic pathogens—and occasionally, against outside invaders. And if bitter rivals Welch bacillus, leader of the bad bacteria, and Bifidobacterium, leader of the good, get their way, the battle for intestinal supremacy and safety will never end.
The Cells at Work: Bacteria! manga launched in Nakayoshi in April 2017 and ended in July 2020. Kodansha Comics is publishing the manga in English.