What are the symptoms?
Pneumonic plague occurs when Yersinia pestis infects the lungs. The first signs of illness in pneumonic plague are fever, headache, weakness, and cough productive of bloody or watery sputum. The pneumonia progresses over two to four days and may cause septic shock and, without early treatment, death.

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1. What is the plague?
2. How do people get plague?
3. What are the symptoms?
4. How is it transmitted?
5. Can the plague be treated?
6. Is there vaccine available to prevent the plague?
7. Is there preventive treatment?
8. How many cases of plague occur in the United States?
9. What is the mortality rate of the plague?