✔ 最佳答案
Pneumonia is not contagious but the bacteria or viruses that cause the condition may be. Those microorganisms usually do not do much harm to a healthy individual. However, it can be a problem to those whom are either every young or very old; people with suppressed immunity or on certain medications. Most people with bacteria-caused pneumonia do not need to be isolated.
Hand hygiene is the key to to prevent the spread of many common microorganism.