It can be funny but it’s honestly more emotional than you might expect. It’s really more of a drama. That being said, the jokes make it easier because the setting is really gloomy.

Also, don’t think about the science too much going in. These are classic zombies that just became more human through medicine. They haven’t even really found out why they came back, only a way to treat it. The medicine hadn’t even been around long enough to know what happens to the patients longterm. Also, the fictional medicine is not very subtle in the fact that it almost sounds like a real antidepressant. (Neurotriptyline vs nortriptyline)