1.   Airborne plague causes pneumonia and is the deadliest, most communicable form of the disease.

2.   But doctors are concerned that the bacteria that cause pneumonia might soon develop resistance to most common antibiotics.

3.   It can cause pneumonia, bronchitis and sinus infections, but can also linger in the body without producing any symptoms at all.

4.   Several agents that cause pneumonia can thrive in infected oral tissues of people with periodontal disease.

5.   Sometimes it washes into the windpipe and the lungs, where it can irritate delicate tissues and cause aspiration pneumonia.

6.   The danger results from the breakdown of lymph nodes, leading plague bacteria to spread to the lungs to cause pneumonia.

7.   The Kremlin did not explain what caused the pneumonia.

8.   The vapors cause a pneumonia.

9.   Tularemia is rarely fatal, but it can cause severe pneumonia, McKinsey said.

10.   When the organism causes pneumonia or gets into the bloodstream of someone with lowered resistance, it can be lethal.