The spread of COVID-19 continues in China and in the world as the World Health Organization (WHO) baptized it, warned since 31-12-2019 of the new SARS (Severe Acute Respiratory Syndrome). The epidemic has its own basic reproduction number, Ro, which is considered less than 1 when it runs out of passage from one individual to another and tends to rise as in the previous SARS epidemic (2002-2003) between 2 and 4 to get to measles with values of 12-18. The current Ro is estimated between 2 and 3. More than 86 thousand are infected today 03-3-2020, with almost 3 thousand deaths. Flights to China have been suspended, while seasonal flu has infected and killed more people.