As COVID-19 continues to spread across borders, the World Health Organization has warned international leaders to be ready to take action to protect their populations. Thirty-seven countries are now known to be affected, with the total number of victims running at more than 80,000. 

Here, CGTN is joined by Pasi Penttinen, principal expert at the European Center for Disease Prevention and Control. He explains how COVID-19 has become the fastest-moving outbreak that experts like himself have yet seen.