As someone who thinks that the immune system is the most exciting feature of the human body, I always waited for a day I would find a manga like "Hataraku Saibou", otherwise known as "Cells at Work".
Story: 9
The story mainly focuses on a red blood cell (Ae 3803) and a white blood cell (U-1146). They aren't given names, but numbers. The red blood cell has a hard time trying to find routes through the body, so the white blood cell helps her out. Through this, we get to know what exactly happens in different parts of the body and encounter different types of cells as well.
Each chapter focuses on a certain pathogen's invasion, a part of the body and cancer. I personally liked the chapters about cancer the best, since that's when the most fighting happens (both between immune cells and against cancer cells... )
Now the main question people might ask is - how accurate is it? From what I've learnt in Biology, I don't think it's high level Biology, but it's not too low either (in UK terms it would be between GCSE and A-level). The information they give is not complicated to understand (maybe not for names...) and they make sure to give the necessary parts.
Art: 10
This is amazing- very detailed. A manga about cells represented as humans would mean that it's hard to show their functions properly and structures within the body - heart, lungs, kidneys... - without straying too much from scientific data. But this manga nailed it. Of course, it's not 100% accurate - e.g. when bacteria are killed they spill out blood.
The way they represent harmful bacteria/viruses is sometimes a bit odd for me - some of them look more like aliens... (but I guess that's the impression they want to give to show that they don't belong in the body)
Character: 9
I like the white blood cell a lot. Let's say... He's much better at teamwork than the rest of the cells of the immune system... He is kind to other types of cells unlike the killer T-cell, who is pretty aggressive since he has to kill infected cells...
There is some development for the red blood cell, as she starts to know the routes within the body properly thanks to white blood cell.
Can't forget the platelets - so adorable!!!
Enjoyment: 10
Please, just read the first chapter. It won't be a waste of your time, it's really worth it.
Overall: 9
I'll give this a 9 - for now everything looks good but since it's still ongoing...