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As of 3 February 2020, approximately 19,843 cases have been confirmed,[4][16] including in every province-level division of China.[4] The first confirmed death occurred on 9 January[17] and since then, as of 3 February 2020, 426 deaths have been confirmed.[4] A larger number of people may have been infected, but not detected (especially mild cases).[18][19] The first local transmission of the virus outside China occurred in Vietnam from a father to his son,[20] whereas the first local transmission not involving family occurred in Germany, on 22 January, when a German man contracted the disease from a Chinese business visitor at a meeting near Munich.[21] The first death outside China was reported in the Philippines, where a 44-year-old Chinese male citizen confirmed to have contracted the coronavirus, Streptococcus pneumoniae and influenza B died on 1 February.[22][23]

In response, Chinese cities with a combined population of over 57 million people, comprising Wuhan and 15 other cities in the surrounding Hubei province, were placed on full or partial lockdown, involving the termination of all urban public transport and outward transport by train, air and long-distance buses.[24][25][26][27] Many New Year events and tourist attractions have been closed to prevent mass gatherings, including the Forbidden City in Beijing and traditional temple fairs.[28] Hong Kong also raised its infectious disease response level to the highest level and declared an emergency, closing its schools until March and cancelling its New Year celebrations.[29][30]