Chinese President Xi Jinping said Monday that it’s “extremely crucial” to take every possible measure to combat a new coronavirus that has infected more than 200 people in the country.

His remarks, cited by state broadcaster CCTV, came the same day that the country reported a sharp rise in the number of people infected by the novel form of viral pneumonia, including the first cases in the capital.

The outbreak comes as the country enters its busiest travel period, when millions board trains and planes for the Lunar New Year holidays.