Before revision:  We analyze the rate \alpha in different countries, choosing as a starting point in each countrythe first day with 30 cases and fitting for the following 12 days, capturing thus the early exponential growth in a rather homogeneous way .
After revision:  We analyze the rate \alpha for each country, starting from a threshold of 30 cases and fitting for the following 12 days, capturing thus the early exponential growth in a rather homogeneous way .