Unfortunately, not only are western governments generally not responding with the same speed and aggression, they cannot respond in anything resembling the way China has, for many reasons. China has unique set of conditions that allowed them to contain the virus as they did.
And part of the reason the cases are declining so precipitously is that China actually took their already draconian measures to yet another level over the last month — to an extent that absolutely cannot be recreated in almost any other nation.
But it’s also worth noting that those numbers may not be entirely accurate, as they are still vetted through Chinese central authority and they have previous (and fairly good motive) for massaging them.
That’s not to say I think western governments are fully doing what they can, by any means. I think most aren’t actually even doing that. So they are not only incapable of taking the drastic action China has, they aren’t generally availing themselves of many of the options they are capable of undertaking.