Wuhan was probably a lot further up the curve of exponential spreading before China took any action than a superficial reading of the stats would suggest. Their reported cases were basically rate-limited by how fast they could test people with the most obvious and serious symptoms at the point they locked down Wuhan. It's not clear exactly how bad it was - I don't think there's much data out there - but there's a couple of alarming numbers quietly tucked away in the WHO joint mission's report. Apparently they went back and tested samples taken from people in Wuhan with influenza-like symptoms at the start of January. 1 out of 20 samples from the first week of January tested positive and 3 out of 20 samples from the second week. That's... not good. (No numbers are given for subsequent weeks.)
There's no particular reason to assume it would take the same path in other countries took some sort of action, even if the actions weren't nearly as forceful as a complete lockdown. Especially since that lockdown was basically a blind and desperate shot in the dark based on incomplete and dubious information.
There's no particular reason to assume it would take the same path in other countries took some sort of action, even if the actions weren't nearly as forceful as a complete lockdown. Especially since that lockdown was basically a blind and desperate shot in the dark based on incomplete and dubious information.