As a historical document of something that really didn't happen long ago- even if it feels like history- it's great. As a narrative, it doesn't quite manage to be as compelling.
They do really stick to their approach of just showing - in a straightforward and objective manner - the struggles and tribulations of Wuhan's doctors, nurses, and early patients in the first couple of months of the pandemic.
It really nails the opening and closing scenes, there are a couple of people covered here and there that make an impression, and there are some great, haunting shots of the city in lockdown that never cease to look eerie, even though I've literally been out in the streets and on roads that look just as empty in my home city!
The approach does work for creating a feeling of neutrality and realism, but it's not as engaging as a story, with a sense of (possibly intentional) repetition making it hard to focus during certain parts.
But even then, if I only take away the beginning, ending, a few patient stories, and some of the visuals, that's more than enough. It's an admirable effort to show the early days of COVID-19, and while it's not super "entertaining" or emotionally engaging (save for a couple of heartbreaking sequences that I won't spoil- but you will know them if you watch this documentary), it is interesting.
And it also works as a testament and love letter, if you will, to medical professionals in Wuhan and the world over, highlighting the insane sacrifices they've made to save lives and reduce further outbreaks.
Also, if anyone reading this knows a COVID-denier (if any still exist,) please show them the first five minutes of this movie and see if they have the guts to say it looks exaggerated or not that big a deal- it's powerful, potentially attitude-changing stuff.