It is very low indeed, and a large percentage of the cases are involving strains from other countries, but hopefully the number is not real zero[1], even after

It is very low indeed, and a large percentage of the cases are involving strains from other countries, but hopefully the number is not real zero[1], even after discounting the strains from other countries. [1] https://bmjopen.bmj.com/content/6/5/e010608 https://bmjopen.bmj.com/content/6/5/e010608