The number of "detected" cases is influenced by the testing capability of those performing the tests. In a few days the real average "growth" rate will be clearer, but until the effects of some strong enough measures start to affect the numbers nobody can expect anything much better than what we see in Italy -- the curves across the Europe have "similar" growth:
https://twitter.com/MarkJHandley/status/1237781162153717760
or
https://twitter.com/illandancient/status/1237857213621907456