Pneumonic plague is more serious and less common than bubonic plague. The outbreak was in the form of bubonic and pneumonic plague. The rapid urbanization of Australia led to epidemics of typhoid fever and the Bubonic plague. The population suffered from periodic epidemics, including several serious outbreaks of bubonic plague. The pneumonic form may occur following an initial bubonic or septicemic plague infection. In outbreaks of bubonic plague, rats begin dying out before humans. Madagascar has experienced two notable outbreaks of bubonic and pneumonic plague in the 21st century. A plague doctor was a medical physician who treated victims of the bubonic plague. The result was widespread famine, aggravated by an outbreak of bubonic plague. The Third Pandemic of Bubonic Plague attacked Hong Kong in 1894. This military aerial spraying killed tens of thousands of people with bubonic plague epidemics. It depicts Bonaparte in Jaffa visiting soldiers infected with the bubonic plague. The war resulted in famine, which was worsened by an outbreak of bubonic plague. In 1647 an outbreak of bubonic plague killed a quarter of the population. In 1901 large slum areas were burnt and razed after an outbreak of bubonic plague.